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Cirrus clouds - explanation - examination of a/c
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Hector



Joined: 20 Jul 2006
Posts: 266
Location: Wellington

Posted: Tue Jan 01, 2008 5:39 pm    Post Subject: Cirrus clouds - explanation - examination of a/c  

This post is a reply to a post by steve clougher at https://www.mysteriousnewzealand.co.nz/forums/viewtopic.php?p=5881#5881 in Reporting Area - Chemtrails, topic Marlborough sky 29 Dec >>>.

steve clougher wrote:
sure, Hector, they are clouds, sure, they are cirrus

anyone can see that

as you well know, we here are concerned with what else they might be , too

we have seen them generated from jets, in ways that are not consistent with the official explanation

That is exactly the point. They are cirrus clouds (which happened to originate as contrails). I posted my photo in the reporting area because that is where we report sightings of contrails on this forum. smashdracs put up his photos, and I put mine up which, coincidentally, was taken about half an hour later, which is why I put it up.

If, as you say, they are cirrus clouds, how can they be anything else at the same time?

The "official" explanation has always been that these are contrails that have been formed in conditions where the air is supersaturated with respect to ice, and so they don't dissipate as "normal" contrails do. "Normal" contrails form in air that is not saturated with respect to ice, and so they dissipate in a few minutes. Contrails which do persist are cirrus clouds and will behave as cirrus clouds do - they will be moved and stretched by the wind.

There are dozens, possibly hundreds, of official explanations like that from Air Forces, Governments, research institutions, universities, etc, and unofficial ones from interested meteorologists such as myself. Why are these explanations not accepted?
See Contrail Science "The Science and Pseudoscience of Contrails and Chemtrails"
Also read what the meteorologists at DonnerWetter.de think of "chemtrails": http://donnerwetter.de/intern/presse/spiegel.mv?action=show&id=5947 (Translation is left to the reader... copy and paste into altavista BabelFish and select "German to English".) Remember these guys were the heroes of some on this forum while it was thought they had caught the German Armed Forces interfering with the weather in some way.

steve clougher wrote:
perhaps, instead of trivialising our efforts, you could use your knowledge of scientific systems, to investigate in a full and fair way, the real nature of these cirrus clouds?

I am not trivialising your efforts. I have used my meteorological knowledge to investigate the nature of these cirrus clouds fully and fairly. They are cirrus clouds; anyone can see that, as you said.

steve clougher wrote:
we have read , widely and with healthy scepticism, many accounts claiming to associate chemtrails with weather control initiatives, with weapon systems, with energy transfer systems , and more

[...]

there are accounts, substantiated by analyses of soil samples,and of the filterings from air-conditioning units, stating that these chemtrails contain sulphur, aluminium oxide, barium stearate, and occasionally, polymer threads carrying biological pathogens.

have you researched any of this, yourself?

Yes, I am aware of the reports being referred to. Apparently the healthy scepticism hasn't got to the place where this is asked; "Wouldn't you find these elements and stuff an any soil sample at any time in any industrialised (polluted) country? Where is the connection with contrails?" Contrails are almost everywhere and occur with sufficient frequency that people will attach them to almost anything... lethargy, metallic taste, disease, breathing disorders, stuff in a glass jar, scalar energy beams in the sky, and so on. People are trying to link "chemtrails" up with HAARP. What could possibly be the connection between ionosphere research and (artificial) ice clouds in the upper troposphere? In my opinion there is no connection.

steve clougher wrote:
...it can be clearly seen that some jets generate them, and not others , with orthodox explanations falling well short of adequacy

What is wrong with this explanation? If the temperature of the mixture of exhaust gas plume and environment air does not go below the dew point of the mixture, it won't condense; if it does, it will. This is a variation on the more common "the conditions have to meet certain criteria for contrails to form". These criteria are known and an upper-air sounding can be analysed to diagnose the conditions, though there are limitations. See my many posts about this. This is an adequate explanation to me and all meteorologists, scientists, anyone who has looked into it with a sufficient understanding of the properties of water vapor and how the atmosphere works.

steve clougher wrote:
please find out for us, if you don't know already, is there a practical way to analyse the contents of these cirrus clouds, using, perhaps, spectrum analysis , of the light reflected from them?

can you suggest any other way to put the question to the test?

examination of the aeroplanes, and their fuel springs to mind

would you be willing to put your name to such a request?

it seems to me, that just simply categorising chemtrails as cirrus clouds, and implicitly trivialising the efforts of those of us asking questions, is hardly an honorable manifestation of the spirit of scientific inquiry?

A spectrum analysis of persistent cirrus cloud originating from contrails was done for that "Discovery" program. There was nothing but water vapor and other traces of what you would expect from high temperature combustion of hydrocarbons. Here are the links for the 3 parts on YouTube:
Part 1: http://nz.youtube.com/watch?v=SCFoHlwibcU
Part 2: http://nz.youtube.com/watch?v=lVFuOZu7Xhg
Part 3: http://nz.youtube.com/watch?v=lwvUhalx-lU
I think the engineering tests on jet engine exhaust gases (fuel tests), and the spectrum analysis of contrail cloud are in Part 3. I know this program was given a bit of a rubbishing on the boards. I think the program gave all sides a pretty fair treatment.

This group (on MNZ, in NZ) is spread geographically wide enough and has enough motitation and skills to examine aircraft (from the terminal building or where ever) before departure, track it en route by its flight number, confirm that it is contrailing (by observation of the tracked plane), and examine it again at the destination (from the terminal building, through the ground-side/air-side fence, or where ever). Look for the spray nozzles on the tail section. Are there any? Note which refueler truck attends the plane, and note all the other aircraft types that the same truck attends. Note which other vehicles attend the plane and what they do.
Why has this not been done already? Get organised! Do something constructive! There you are; I've put my name to the request. I can assist where/when required. Do we still have someone active in Christchurch?

It is difficult not to trivialise the whole "chemtrail" thing because it is trivial. Here's a short story to illustrate the point.
Last night, I was showing my dear wife "J-Track 3D" from the good folks at NASA ( http://science.nasa.gov/Realtime/jtrack/3d/JTrack3D.html ). I explained that someone (probably several organisations) had a database containing the orbit details of the thousands of objects in orbit around the earth. If a new satellite (or spacecraft) needs to be launched, someone has to work out an orbit for it that does not conflict with the orbit some bit of junk or a multimillion dollar meteorological satellite, etc. She thought for a few seconds and said (I'm paraphrasing), "That's amazing! We all trust those people, and trust that the database is accurate and the orbit calculations are sound. Nobody questions it. And then there are people who think chemicals are are being sprayed out of jet planes! The idea of it is ridiculous!"

steve clougher wrote:
especially when there may be means available, to investigate the phenomenon objectively? can you help to clarify this possibility?

It's been done by the "Best Evidence" guys on Discovery. The results are in. Ice clouds; end of.

Anyway. Happy New Year to you all.
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steve clougher



Joined: 15 May 2007
Posts: 977
Location: north-east victoria

Posted: Tue Jan 01, 2008 8:32 pm    Post Subject:  

thanks, Hector, glad you're giving this your best shot

what do you know about this spectrum analysis gear?

can you rent it?
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steve clougher



Joined: 15 May 2007
Posts: 977
Location: north-east victoria

Posted: Tue Jan 01, 2008 11:02 pm    Post Subject:  

well i looked at that Discovery vid, looks dodgy to me........shifty-looking hombres, i certainly wouldn't like to trust any of them with my satellite

what about the kind of spectrum analysis they do on the light from stars?

can't i get one of them, as a feature on one of the better brands of mobile phone, perhaps?

seriously, can something like that be used to analyse the contents of a cloud?
or does it need to be at thousands of degrees ?
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Hector



Joined: 20 Jul 2006
Posts: 266
Location: Wellington

Posted: Wed Jan 02, 2008 8:11 am    Post Subject:  

steve clougher wrote:
what do you know about this spectrum analysis gear?
can you rent it?

steve clougher wrote:
seriously, can something like that be used to analyse the contents of a cloud?
or does it need to be at thousands of degrees ?


No, I don't think you can "rent" it.

Here is a frame from Part 1 of the program; about 3 minutes in.

That guy is the owner/operator (I suppose), Dr Wayne Evans (Atmospheric Scientist).

CSIRO may have one of these. You'd have to ask them. I doubt that NIWA (NZ) has one; I have never heard about any thing like this among their research programmes. I doubt that any of the NZ universities has one of these.

The most effective type of "research" (and cheapest) is to observe and document what happens on the ground at airports to planes immediately before and after they are observed to be "laying the chems". The same applies to Australia and anywhere else. Just do the leg work. If something is found, then the expensive-looking equipment can be wheeled out. (Where will you get the Finance?)
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steve clougher



Joined: 15 May 2007
Posts: 977
Location: north-east victoria

Posted: Wed Jan 02, 2008 9:00 am    Post Subject:  

just a suggestion, it's by no means a pleasant subject to study, but if you take the time to investigate the people who control commodities, and currencies, believe me, it changes your perspective

in my case, i had a deep faith in the expertise and respectability of those blokes in suits (they are all males) who make decisions on interest rates, and how much money to print

of course i had a degree of cynicism too, but i had an underlying complacency, which i did not know was there until it was shattered

have a look at the "opal files"........it's only 25 pages, of startling revelations, giving a blueprint for the invasion of Australia and New Zealand by means of corrupting selected businessmen, academics, politicians and the media , using no other weapon than money

i found googling "federal reserve corruption" led into fields that detailed the insane ruthlessness of the powermongers

as to the possible connection between the HAARP "experiments" and chemtrails (sic) , the thing that really clinched the conviction that weird stuff is going on, for me,( and i have looked closely, the whole time, at the possibility that, like the bunyip, they really don't exist,) is the observations i have made of heavy trails appearing behind aeroplanes in the lower and middle troposphere.

without a rangefinder, i cannot, of course, give you figures, but i can assure you that i have excellent long vision, and i happen to live where there is a large amount of air traffic

it is not a matter of fine judgement.......on a dozen occasions in the last three years, i have seen planes giving off really thick trails, flying significantly lower than normal traffic, when said normal traffic was giving off only the normal short, non-persistent condensation trail

on a few of these occasions, the low-flying planes were flying strange vectors, or in a holding pattern, and producing inordinate persistent trails

in the last six months, i have seen chemtrails (sic) preceding rainclouds, with remarkable predictability, that seems to have nothing to do with the dew point and altitude

even factoring in a large credibility gap , on account of possible inversion-layer phenomena, the picture gained is hugely anomalous

other air traffic in the same area has been releasing ordinary contrails, or nothing at all

i'm talking about a score of episodes , in six months, which i have documented

ultimately, proof can only come from a group effort , spread over a large area, recording air pressures, temperatures, wind shear etc., such as you suggested for the monitoring of planes and fuel.

in fact, this effort won't be forthcoming, and in the case of your suggestion, i think you would find that first, there would no longer be adequate visual access from the terminal, and second, anyone making observations of this kind in an airport, under the present laws, would soon find themselves spending most of their time in the local police-station, answering pointed questions

when you also study a bit about Nikola Tesla, and examine the evidence for the development of "starwars" weapons systems, the connection between HAARP, chemtrails (sic), and weather control, among other propositions, becomes less far-fetched

to believe that the anomalies i see regularly, can always be explained by temperature inversion layers, (no doubt some can!) is far harder to swallow
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steve clougher



Joined: 15 May 2007
Posts: 977
Location: north-east victoria

Posted: Wed Jan 02, 2008 10:21 am    Post Subject:  

here's something that elucidates how soundings are made, by the people with "Finance"

http://www.ips.gov.au/IPSHosted/INAG/web-64/2003/benito.pdf

this Spanish station utilises radio transmissions in 2830 Mhz at 1 Kw, and long wavelenths at 10Kw, to probe the ionosphere, using a "digisonde"

much mention is made of the excellent local wines!!!

it seems there has been a heap of Finance made available for PhD studies into the "coupling" of the ionosphere with the stratosphere!

stay tuned............................
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Hector



Joined: 20 Jul 2006
Posts: 266
Location: Wellington

Posted: Wed Jan 02, 2008 9:19 pm    Post Subject:  

That is ionosphere and stratosphere, not troposphere.



Look, the bottom of the latest published sounding ( http://www.inta.es/iono/IonoGIF/ ) starts at 60km, 50km above the tropopause! It's nothing to do with the troposphere or contrails! The HAARP guys might be interested, though HARRP isn't mentioned in the collaborations list. Who knows?

Back to the earlier post...

"commodities, and currencies ... corrupting selected businessmen, academics, politicians and the media" I know. Whatever; it's not about contrails, so ... some other topic some other time.

steve clougher wrote:
as to the possible connection between the HAARP "experiments" and chemtrails (sic) , the thing that really clinched the conviction that weird stuff is going on, for me,( and i have looked closely, the whole time, at the possibility that, like the bunyip, they really don't exist,) is the observations i have made of heavy trails appearing behind aeroplanes in the lower and middle troposphere.

From http://www.haarp.alaska.edu/haarp/faq.html
Quote:
What is HAARP?
HAARP stands for The High Frequency Active Auroral Research Program. The goal of this program is to further advance our knowledge of the physical and electrical properties of the Earth's ionosphere which can affect our military and civilian communication and navigation systems. The HAARP program operates a world-class ionospheric research facility located in Gakona, Alaska.



http://en.wikipedia.org/wiki/Ionosphere
The ionosphere is above 85 km; that is, above the mesopause. Contrails occur in the upper troposphere around 8 to 10 km, below the tropopause. Get it? There is no possibility that there is a connection between contrails/chemtrails and HAARP, and vice versa.

Quote:
it is not a matter of fine judgement.......on a dozen occasions in the last three years, i have seen planes giving off really thick trails, flying significantly lower than normal traffic, when said normal traffic was giving off only the normal short, non-persistent condensation trail

on a few of these occasions, the low-flying planes were flying strange vectors, or in a holding pattern, and producing inordinate persistent trails

Yes, the high bypass engines, like on a B747 and the like, do produce a thick contrail; there is the turbine tailpipe and the encircling turbo-fan part, a metre and a half or more in diameter. The 2 or 4 trails soon merge in the wake of the plane.

I've already explained about "normal" contrails, and the other type which are arousing all the excitement. Re-read my earlier post again.

Estimating height of these things is a problem, and the apparent height can seem low when there are no queues for height and distance estimation (like hills or mountains). Get a mate; you both need a cell phone (to synchronise observations) and means to measure elevation and azimuth accurate to a degree or two. Get a known distance apart (several kilometres), and observe a plane at the same time. Do the math; work out the height. I'll help with the trigonometry if you get stuck.

I can't comment on strange flight routes or holding patterns; I am not familiar with Australian flight routes or air traffic management.

Quote:
in the last six months, i have seen chemtrails (sic) preceding rainclouds, with remarkable predictability, that seems to have nothing to do with the dew point and altitude

even factoring in a large credibility gap , on account of possible inversion-layer phenomena, the picture gained is hugely anomalous

What is the basis for saying it has nothing to do with dew point and altitude? Have you measured it up there? Actually, it has everything to do with temperature and relative humidity (or vapor pressure). And nothing to do with inversion layers.

Air cools as it is lifted up by some mechanism or other. As a weather system, such as a cold or warm front, approaches, the air in most of the troposphere gently rises. That's why the pressure at the surface falls, and why, eventually there is lots of cloud.
Because the air is rising it is cooling at about 10 degrees C per 1000 metres that it rises. At some stage the temperature of the rising air at jet cruise altitude may cool below the Critical Temperature for contrails. If it does, and when a jet flies through, it will be contrailing. This is why you often see contrails just before the weather system turns up. And perhaps, because of that coincidence, it could be wrongly concluded either that contrails produce or prevent rain. They do not do either.

Quote:
ultimately, proof can only come from a group effort , spread over a large area, recording air pressures, temperatures, wind shear etc., such as you suggested for the monitoring of planes and fuel.

There is no need to do all that over a large area. Air pressure and temperature at the ground is irrelevant. It is necessary to look at a nearby (and recent to the sighting) radiosonde sounding for the temperature, humidity (and wind shear conditions) at the altitude the observed plane is flying at.

Quote:
in fact, this effort won't be forthcoming, and in the case of your suggestion, i think you would find that first, there would no longer be adequate visual access from the terminal, and second, anyone making observations of this kind in an airport, under the present laws, would soon find themselves spending most of their time in the local police-station, answering pointed questions

Bulldust! (as the rougher characters on "McLeod's Daughters" say) What present laws? There is no law against taking photos of aeroplanes at airports.

If you're a wee bit paranoid about being caught and questioned, I suggest you adopt a disguise. You need to look like a geek. So, forget the sleeveless hoodie, MC Hammer pants, and Rasta cap, backpack, etc. You need a short sleeve, vertical stripe shirt with a plastic pocket protector for the pens you will have there. Shorts and sandals, with socks (if you can stand it!). No hat; maybe a peak-only type of thing you sometimes see lady tennis players wearing. Carry your stuff in a satchel type of bag. Bring a cut lunch, and lashings of ginger beer. Have a notebook and make notes in it (you'll be doing that anyway). Work in pairs, and confer often. Think "plane spotters". If you dress like a geek and behave in character, everyone will ignore you (except perhaps the Westies, Hoodies and Homies - who generally don't hang about causing trouble at airports anyway).

But if you don't do the leg work, you won't know the answers, will you.
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steve clougher



Joined: 15 May 2007
Posts: 977
Location: north-east victoria

Posted: Thu Jan 03, 2008 1:07 am    Post Subject:  

that's a good idea, to triangulate with a friend
if it's nothing to do with inversion layers, though, which i agree with, tentatively, then there is an anomaly
altitude is a problem, admitted, but much less of a problem for me than for you.

i'm completely, unequivocally certain that i've seen planes flying lower than others, in the same timeframe, giving off heaps of trail, where the higher flying planes were giving off little or none

one of the commonest stories, and one which emanates from official sources, concerning HAARP, is that one of its anticipated gifts to science and the human race, will be the ability to place a dense airmass in the way of oncoming ballistic missiles

other projected functions include the transfer of energy from the ionosphere to any place on the earth's surface

if it stretches your credulity, to contemplate these things, perhaps it will help to investigate the well-documented achievements of Nikola Tesla, and discover for yourself what he was able to achieve with resonating systems, sixty and seventy years ago

for myself, i don't have a problem envisaging resonating, amplified and focused energy being directed with scant respect for the supposed discrete layers of the atmosphere and ionosphere

thanks for the geek fashion advice, that is very funny, but unless it's very cold or littered with broken glass, i go barefoot

i don't know how long it is since you went looking at aeroplanes in large airports, but "security" measures have ensured that your suggestion about watching the fuel trucks would be futile, plus, the likelihood is more ,that additives would be administered by a separate contractor

one report states that an airport employee found three extra tanks in the toilet holding compartment, and that the product was released via the static eliminators on the trailing edges of the mainplane

i don't imagine that that method applies across the board, and it would be reassuring to get more than one such report

another report, or rather a theory, has it that if an electrical charge can be applied over the top of a raincloud, it can prevent the rain from falling.......in this theory, the chemtrail acts as a flux

i've seen plenty of chemtrail activity that would seem to support this theory

another way to dry up rain, might be to concentrate airmass in the vicinity of a raincloud , and increase the local air pressure

i take note of your reluctance to admit that there is anything in this. You may be right, it may all be paranoid illusion. all i would say about that at this stage, is there is a lot of evidence pointing in a coherent way, to something entirely different to that

forget about the implications for weather-forecasters, for just a minute, if the weather is controlled by the US military.......shudder!......put yourself in the position of the mad b...st...ds who have to keep grabbing more and more power to keep ahead of the other mad b...st....ds coming up behind them.

before you react, and reject all these ideas out of hand, just play around with them for a bit, have a scout around some of the "fringe" websites, with a view to getting some pointers to help you in your (pretended) ambition for world domination

these sites may not be around much longer, apparently John Howard , just before he stepped down , introduced legislation, without debate, giving the federal police discretionary powers to remove websites, if they qualified as "terrorist" sites in the opinion of the police
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steve clougher



Joined: 15 May 2007
Posts: 977
Location: north-east victoria

Posted: Thu Jan 03, 2008 12:26 pm    Post Subject:  

i'd like to try and describe in detail, some of the things i've been mentioning

in late november, i saw a jet, painted red like Virgin Airlines, lay a thick, short trail, bang over the top of a very active thunderstorm, which lay on the flight corridor, between Sydney and Melbourne, which this aircraft seemed to be following, in the normal way, perhaps a bit lower than normal for jets

next, to my surprise, (i have never, at any other time in three years, seen a plane do this), it turned south, and headed directly towards another group of thunderstorms,perhaps 15 or 20 km. away, which i was watching on the BOM weather radar

Before it vanished behind trees, i saw it start to lay chem, as it approached these storms

to my complete astonishment, when i went out to look half an hour later, the thunderhead had collapsed out of existence.......this was at 6pm, when these things are usually at the most powerful stage of expansion

the month of december has been remarkable, in that chemtrails have been apparent almost exclusively, slightly before, and during the passage of rainclouds.

Hector has suggested a perfectly reasonable scenario, for why this should be so, in his previous post, and others. By all means , Hector, i have tried to keep such considerations in mind! Do you know of any second-hand radiosonde sounders on the market?

unfortunately, and i wish it were otherwise! the observed phenomena are not so easily explained

over the last year, there have been chemtrails observed in all kinds of conditions, regarding humidity. without being able to measure the relative humidity directly, a seat-of-the-pants assessment can be made, taking into account the information available on the BOM site, etc.

at the same time, the progression from trails to haze can be seen to correspond very much, with the humidity level, as could be expected

as well, the phenomenon of planes producing trails at lower altitudes than those producing nothing , not even contrails, has in a high percentage of cases , looked likely, and in some, has been absolutely obvious

only the month of december, to my knowledge, has exhibited this almost stringent correspondence, between chemtrails and approaching rain, the trails appearing, typically in equally spaced lines, in groups of three, between 4 hours and just a few minutes before the rain front

other months have had a more mixed record

one front i saw , had a lot of overcast preceding it, and no chem was visible, until it passed, and for a limited time, you could look over the back of this receding squall front, and see five fat chemtrails, exactly evenly spaced

as well, during its passage , jets were audible, very loud

that was the most blatant exhibit of december, but the same pattern was evident every time rain looked imminent, all month:chemtrails, low-flying jets in overcast conditions, no rain or little , out of promising clouds,.......with one exception: just before christmas, we got two to three inches, out of a bigger than usual "weather event" and guess what, ? no chemtrails to be seen.

there has been little chem activity since the rain.....no rain either!

thanks for the pointers and help, Hector/Ross. i don't think i'll take your fashion tips to heart, but i will certainly look into the weather-education stuff, as an ongoing thing. even if this chemtrail controversy was resolved today, that knowledge is valuable
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Hector



Joined: 20 Jul 2006
Posts: 266
Location: Wellington

Posted: Thu Jan 03, 2008 5:40 pm    Post Subject:  

Thanks for your observation notes.

I suggested that your qualitative height estimations were awry because of the lack of high ground for height and distance clues but you didn't comment about your surrounds. My map of southeast Australia shows you have some hills around Wodonga, but there are no spot heights; shading suggests it's all below 500m AMSL except to the south and east. I urge you to try some quantitative paired height observations. You can do it photographically and pick off the angles from the images. You will need to do some calibrations at the zoom you use. Get azimuth from landmarks and knowing where the photo was taken from.

I also urge you to look at radiosonde data from the 2 closest stations each day and tie the data in with your observations. If you want, I'll post some lo-tech guidelines for how to do this, or maybe more.

We are just about done in this topic, and we can agree to disagree about contrails/chemtrails for now. You have asked me to suspend belief for a while and consider other views. Ok, and I ask the same of you. With your increasing knowledge of the workings of the atmosphere, have a go at interpreting what you observe in terms of what you know - that is, what has been measured by the Bureau (they're good guys) at radiosonde (upperair) stations around you.

Just to close...
It is just not possible to arbitrarily heap the air up in some place. The atmosphere is a fluid, and is more or less in dynamic equilibrium. Horizontally, there is a balance of these forces on a "parcel of air": pressure gradient force, the Coriolis force (because we are on a rotating rame of reference), centripetal force (due to curved movement, if there is any), and friction (near the ground). Any change in any of these (including any kind of heaping up or removal, which will affect the pressure gradient force) results in changes in the dynamic system that will bring it back into equilibrium.

Finally, a radiosonde programme is expensive to operate. These days, hydrogen filled balloons are used to lift the use-once-and-discard scientific package. The hydrogen is either supplied in bottles, or it can be generated (in the "Bomb Shed"!) with Aluminium (make sure it is pure!) and NaOH (caustic soda), or by the electrolysis of water. In the old days (1895?-1920?) steel wire tethered kites were used to lift the reusable scientific package. Here is a photo of one ready for launch from the good folks at NOAA. (Unknown location and date.)

That's the winch in the background with the wheel thing on top, and the drum of wire at shoulder height behind the guy on the left.

Ah! Those were the days. Hands-on observations using dangerous equipment.
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smashdracs



Joined: 23 Nov 2005
Posts: 1002
Location: Wellington NZ

Posted: Thu Jan 03, 2008 6:28 pm    Post Subject:  

I really appreciate the work you put in to these posts now Hector.

They are almost always a great and challenging read. I will have a reply in the German thread soon (arranging translators and reading and reading.....)

As you said earlier, check re-check and check again then post.... :)
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steve clougher



Joined: 15 May 2007
Posts: 977
Location: north-east victoria

Posted: Thu Jan 03, 2008 10:17 pm    Post Subject:  

we are 40km SE of Wodonga, with plenty of high hills (by Australian standards), but it is actually with reference to clouds that i have got probably my best altitude fixes, although with the 15-45 power telescope , you get a pretty good idea without other references

i've seen the radiosonde for gliders , from Wagga Wagga, but i don't think it has humidity, from memory

thanks again.......i look forward to more study, and to be honest, i hope you are proved right, and me wrong
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Hector



Joined: 20 Jul 2006
Posts: 266
Location: Wellington

Posted: Fri Jan 04, 2008 9:51 pm    Post Subject: Contrail Critical Temperature Calculator  

I've just cobbled together a utility for analysing radiosonde (upper air) data to see if conditions at typical cruise altitude are suitable for contrails to be formed. I've called it Contrail Critical Temperature Calculator. As well as calculating the CCT, it makes an assessment of the persistence of contrails if they are formed.

The 3 NZ stations and 3 stations in southeast Australia are in the selection list, but data from any station will work with it.

It calculates the Contrail Critical Temperature for the altitudes F360, F370 and F380 which are the flight levels that the B737 and A320 jets use on the Auckland-Christchurch route over central New Zealand, and are probably typical cruise levels for transport jets of any type anywhere. The engine type for the calculation is high bypass.

There's some other contrail stuff there that may be of interest, but no photos.

Incidentally, I've checked the engine types fitted to the ANZ (B737 and A320) and QANTAS (B737). The B737s (both carriers) are all fitted with CFM56, and the A320s are fitted with MTU V2500 engines. Both of these are high bypass engines. I was under the mistaken impression until a few days ago that these aircraft had low bypass engines. This (hight/low bypass) makes only a small difference in the altitude of contrail formation - a few hundred metres.
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steve clougher



Joined: 15 May 2007
Posts: 977
Location: north-east victoria

Posted: Fri Jan 04, 2008 11:32 pm    Post Subject:  

terriffic, Hector, if we can get range/altitude accurate to within a few hundred metres, that will be pretty good

awesome work , your blood's worth bottling!

i'll get stuck into the altitude challenge
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Hector



Joined: 20 Jul 2006
Posts: 266
Location: Wellington

Posted: Sat Jan 05, 2008 6:20 pm    Post Subject:  

Due to issues apparently beyond my control I have had to change the name of the "Contrail Critical Temperature Calculator" page. It is now at http://www.freewebs.com/contraildiagnosis/contrailcalculator.htm

And while I have your attention I have put up a method (two, actually) for measuring the height of contrails using photogrammetry techniques and a bit if trigonometry. That page is at http://www.freewebs.com/contraildiagnosis/heightcalculator.htm
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steve clougher



Joined: 15 May 2007
Posts: 977
Location: north-east victoria

Posted: Sun Jan 06, 2008 7:27 pm    Post Subject:  

Using digital signal processing (DSP) and high power, eye-safe, compact, semiconductor laser modules we offer a series of rangefinders that can measure distances up to 20 km (NATO target size). The measurement time for long-range applications is less than one second. For missile height of burst sensor (HOBS) applications the measurement time is less than 1 millisecond.

Using a coding scheme similar to advanced radar systems, the rangefinder features an excellent signal to noise ratio and operates with pulsed RF up to 32 MHz.

The DSP laser rangefinder does not use solid state laser crystals such as Nd-YAG or erbium-doped glass rod or fiber and, therefore, it has an advantage in cost, size, and power consumption. Furthermore, rangefinder operation is independent of small changes in wavelength caused by temperature and so is robust to thermal variations. It also has an excellent safety and security feature. The peak power is at most several watts, a hundred thousand times less than conventional systems, making it inherently safe to operate and simultaneously difficult to detect when in operation.


Please contact us for more information.
info@bostonlaserinc.com
Phone: 607-773-0000

i've sent for a price, but judging from the picture, it will be exxy.

probably a marine radar set, tilted, would achieve the same result.....much less accurate, but i don't think we're going to need terriffic precision
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steve clougher



Joined: 15 May 2007
Posts: 977
Location: north-east victoria

Posted: Sun Jan 06, 2008 7:50 pm    Post Subject:  

another product is from a Swiss firm called Vectronix, who make binoculars at 5-power, which incorporate a range-finder up to 10km. they also see in the dark, and when connected to a support system , they can relay messages on the screen,........ also, presumably , the possibility exists for a transmission of the image to the big screen in the bunker...........pretty handy-dandy

the parent company is Leica, so it will be exxy, but it would do our mission perfectly

there is a NZ agent

golly, it's scary googling around in the military suppliers sites! all that money going on super-elaborate ways to kill people!
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steve clougher



Joined: 15 May 2007
Posts: 977
Location: north-east victoria

Posted: Mon Jan 07, 2008 1:20 pm    Post Subject:  

Vectronix Vector 21 binoculars, with a night channel, retail for around 40,000 dollars

However, the Australian supplier won't sell to the public, they say, by choice, but there is also mention of stringent controls from the US military, over who gets to own these things

there are field glasses with rangefinders available for a few hundred, and rangefinders separate, for similar, but not with enough range
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Hector



Joined: 20 Jul 2006
Posts: 266
Location: Wellington

Posted: Mon Jan 07, 2008 10:06 pm    Post Subject:  

I admire the effort researching for off-the-shelf high-tech equipment for range finding. If that's the path to go, the next search will be for angle measuring equipment; theodolites. Major manufacturers are Kern, Zeiss, Wild and Leica. (Some models may even have builtin ragefinders!) A theodolite will be required to calculate the altitude from the range. The rangefinder will need to be mounted onto the scope of the theodolite, and zeroed in.

Is all this expense justified? Lower tech equipment may be at hand already.
See http://www.freewebs.com/contraildiagnosis/heightcalculator.htm for how it might be employed.
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steve clougher



Joined: 15 May 2007
Posts: 977
Location: north-east victoria

Posted: Tue Jan 08, 2008 1:46 am    Post Subject:  

the angle may be measured with adequate accuracy , with something much cruder than a theodolite..........a 2-foot piece of wood attached to a verandah post with a wing nut, a plumb-bob and a protractor would do

or a cheap plastic sextant...........under $100 new

placing a friend along a baseline has a few drawbacks........chemtrail activity is not entirely predictable, sometimes more than other times........better if you can take data when the occasion arises

a marine radar set is not all that expensive, you would only need the smallest model, and these are available 2nd hand. i wonder if the aviation authorities would have any valid grounds for objection?

mind you, i'd love one of those Vector binocs
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