is this true?

[GrandTheftAut0420]

Sup guys. Not sure if this should be in growing or legal lol but anyways... A friend of mine told me that if you grow outside helicopters use like heat sensors or somethin and they can see ur plants. He said the plants retain heat and are visible. Is this, in fact, true?

[kindprincess]

yes, the bigger the more visible

[madeline]

If that was true then all plants would also retain heat. Their is no special metabolism in cannabis that raises its heat any higher than ambient temps. Test it yourself; stick a thermometer into the plants rectum and see if there is any difference with air temp.

[madeline]

What the choppers look for in outdoor grows is the color and how it doesn't blend well with environment, in most cases. The FLIR they use is for locating heat sources, like heat escaping from a grow room. But most states, if not all require other evidence before issuing a search warrant.

[JackdaWack]

It does, i forget where in the middle east, some enemy baracaded themselves behind walls of marijuana plants, we could not run through them, or see through them with infrared because the heat signature was to strong it shielded what ever was behind it. Im not sure how exactly it works amongst plants but it does happen. now how much u need to activate this, i would assume a shit load. you would need dense amounts of plants and massive trees of plants. its not that it doesnt happen with other plants, its just they need to grow close together and bushy/dense. anything will retain heat at that point.

[darkside]

some of you are very misinformed. the infrared that police use to look for grow ops is used to detect hotspots created by the HID lighting used to grow weed, not the plants themselves. cannabis plants dont give off anymore heat than any other variety of plant.

[noruth]

If leaves/buds are packed together TIGHTLY they will generate heat. A friend used to bring me some in a hollowed out cooler (the insulation was removed and replaced). During the trip enough heat was generted to melt the ice and spoil sandwiches. However growing plants do not generate heat.

[darkside]

If leaves/buds are packed together TIGHTLY they will generate heat. A friend used to bring me some in a hollowed out cooler (the insulation was removed and replaced). During the trip enough heat was generted to melt the ice and spoil sandwiches. However growing plants do not generate heat.

non living objects dont generate heat. maybe your ice melted because your friend removed the insulation?

[TurnyBright]

If you're paranoid about that, set up a HUGE indoor grow of legal plants and shrubs. Then if the flying pigs see your heat signature and try to bust you, they'll be pretty embarrassed to break down your door and find a lot of sage plants.

Once they leave, start growing weed. They'll never bother you again.

[ZeldaG.]

lmao to that!!

lol i actuall have a half dimantled grow cabinet as i decided not to do another one after my first one lol, might chuck some legal palnts in htere lol

[harris7]

Sorry i didn't have time to read all the posts.

YES the reflectance of Cannabis is used by police to find outdoor grow ops
they can actually find very small ones

What they do is they have some sort of camera that looks for the "reflectance" it just means the spectrum reflected by the plants tissues.

Heres a chart of cannabis's reflectance and other plants.

it's very different. Different enough they can use it.

harris,

[harris7]

If you're paranoid about that, set up a HUGE indoor grow of legal plants and shrubs. Then if the flying pigs see your heat signature and try to bust you, they'll be pretty embarrassed to break down your door and find a lot of sage plants.

Once they leave, start growing weed. They'll never bother you again.

That is such a good idea, Rig up a bunch of lights, pump out a big heat signature. CAll in some things to the cops about your house.
Then have a bunch of tomatoes. After they come, start growing

[kindprincess]

non living objects dont generate heat. maybe your ice melted because your friend removed the insulation?


some of you are very misinformed. the infrared that police use to look for grow ops is used to detect hotspots created by the HID lighting used to grow weed, not the plants themselves. cannabis plants dont give off anymore heat than any other variety of plant.

sorry babe, but i have to do it...

YOU, sweetie, are the one misinformed, as stated in a previous post, the infared that the piggies use detects infared REFLECTION, which is a type of heat (i.e. warm spectrum, cool spectrum) when the choppers are flying, they are primarily looking for OUTDOOR GROW OPS. not indoor. this is why they fly twice a year, late spring and fall; harvest season (yeah, i know; the bastards...)

if you don't believe me, search for infared arial photos/marijauna... you'll be able to see the individual pot plants yourself. the MAIN reason they don't get most outdoor grows is because of the narrow path of the infared. even flying 24/7, they couldn't scan every square foot of earth; it would take them years just to clear everything once!

also, tobaco will spontaneously combust in barns whilst drying if not properly ventilated because it produces SO MUCH HEAT!

i just wanted to get you straight, so it doesn't come back to bite you...i'm not trying to be a bitch, i promise:o

love, kp:p

[Myth1184]

If that was true then all plants would also retain heat. Their is no special metabolism in cannabis that raises its heat any higher than ambient temps. Test it yourself; stick a thermometer into the plants rectum and see if there is any difference with air temp.

Cannabis plants give off a unique infrared heat signature that any trained operator can recognize. a Thermometer in the soil wouldnt detect anything, its the heat that is being given off by the plant itself that is what they are detecting.

Police were also using this technology to detect house growing operations by looking at the external walls of houses, but the supreme court ruled these as illegal searches and police can no longer use it in that method.

[Hagbard Celiene]

The high power lights that the dopers use to grow the drugs generate a large amount of heat. The criminal farmer must vent this heat or the plants will get to hot. We can find the unusually hot exhaust pipe in the roof or the hot room in a house that seems to be hot and cold on a regular cycle (hot when the lights are on cold when they are off). taken from
http://www.predictive-maintenance.com/marijuana.html

[Hagbard Celiene]

and from http://www.predictive-maintenance.com/marijuana.html

spectral contrast between marijuana and other plant canopies appears most significant for green, red edge and short wave infrared wavelengths, however, isolation of marijuana canopy spectral signatures during land cover classification may be difficult using visible-near infrared systems

[MajToker]

and pot makes you pregnant.....you are the biggest idiots I have ever seen on a forum. Is the age average here 9 years old? You morons shouldnt smoke pot, you are fucked up enough.....

[kindprincess]

and pot makes you pregnant.....you are the biggest idiots I have ever seen on a forum. Is the age average here 9 years old? You morons shouldnt smoke pot, you are fucked up enough.....

yeah? and how old are you, asshole? coming in with a dumbass remark like that makes me want to assume you're just some ignorant teenage punk. how bout offer up some contradictory info; then you may have some ground to stand on before i push you down. read my friggin college course, dick head...

sincerely,
one pissed of princess

[Hagbard Celiene]

<juvinile> hehe, yeah, tell him KP </juvinile>

[kindprincess]

hey, sorry for the 'tude', but shit like that realy gets my goat, ya know?

[the yeag]

Big brother is watching.... those large 1000wt systems



so make sure you can grab all your gear and go like this:jointsmile:

[bejay]

helicopters are usually just visibly searching for outdoor grows its not that difficult to spot cannabis plants from the air depending on how large the patch is, the plants do not give off any heat.
from what ive read reflectance can be used but its not in very wide use at this time, with cameras mounted on planes large areas can be covered and while im sure they are a few plants with similiar reflectance to cannabis it can pin point potential spots that they would need to search.

[Thanos]

wood chips will also spontainously combust while drying.

[kindprincess]

so will hay bales...

[Hagbard Celiene]

so will saltpeter, charcoal, and sulfer, esp when left together... but anyway, just thought i would bring some more facts...

http://www.imaging1.com/thermal/PT_4000B.html

this is what they use...

http://www.imaging1.com/thermal/PT_4000M.html

and don't try growing on a boat either...

[Perp]

so do people

[divestoned]

infrared does indeed spot indoor or outdoor heat provided by light's indoor,and thermal image of the grass itself outdoor. this is my word and there for it is incontestable!

[harris7]

the plants do not give off any heat.

Why do people keep saying this, Every living thing gives off heat. It's the byproduct of every chemical reaction.

It's just that plants dont need to maintain such a high internal temp, like warm blooded animals. We burn fat just to keep us warm

[harris7]

sorry babe, but i have to do it...

YOU, sweetie, are the one misinformed, as stated in a previous post, the infared that the piggies use detects infared REFLECTION, which is a type of heat (i.e. warm spectrum, cool spectrum) when the choppers are flying, they are primarily looking for OUTDOOR GROW OPS. not indoor. this is why they fly twice a year, late spring and fall; harvest season (yeah, i know; the bastards...)
love, kp:p


This is the science lesson of the day

Dark side is correct!!! The heat your talking about is called Radiant heat, which again is just a E.M. wave. And this is used to catch the hot indoor grow lights.

As I said b4, they use the reflectance signature of cannabis to detect them outdoors. Itâ??s like a thumb print that every type of plant has. Infrared is a part of the Reflectance, as is every part of the E.M. spectrum.

A type of heatâ?¦ not really. Heat energy is what causes atoms to vibrate, and itâ??s not what were talking about. Heat energy creates infrared waves.

What we are really talking about is electromagnetic waves. â??Heat wavesâ?� â??light wavesâ??, radio, micro, and some forms of radiation are all the same thing.

When the waves are long, we call them heat waves (or infrared radiation which means below red)
When we can see them, light waves.
When theyâ??re so small theyâ??ll knock the electrons off your DNA we call them Ultraviolet Radiation (which means above Violate)

[Hagbard Celiene]

true, but that graph that shows a 'dramatic' difference between the EM signature of pot and other plants is comparring pot, WHICH AT BEST IS AN OVERGROWN THISTLE OR SHRUB, to FUCKING TREES!!!


sorry bout that, i don't mean to offend, it just that graph is fucking dence...

[harris7]

From the Wiki article
" Cannabis has higher reflectivity at certain wavelengths than other rural crops, such as corn. Law enforcement agencies have found that the use of this technology has become necessary in their detection efforts because many growers hide cannabis among other plants, making detection with the naked eye difficult even from the air. These techniques are effective and difficult to defeat because a plant's reflective signature is difficult to change or mask."

http://en.wikipedia.org/wiki/Cannabis_(drug)_cultivation#Detection_and_the_law

[Hagbard Celiene]

http://hydrolab.arsusda.gov/RSinARS/posters/poster08.htm

ok, so that is the site that those fucked up graphs came from... they say that

"BRDF characterization for different species in heterogeneous situations."

http://www-modis.bu.edu/brdf/brdfexpl.html

is a site that explains what that means...


and now for something actually useful...

http://list.terc.edu/pipermail/maine_science/1998-April/000786.html

"Here's yet another NASA spinoff. Originally developed to detect ice accumulation on the external tank of the shuttle, this imaging system is now being adapted for early detection of disease in crops and trees.
Please disseminate as appropriate."

"When used in this application, the multi-spectral imaging system along with the real-time processor immediately provides the user with an indication of the amount of chlorophyll in the plant's leaves," Spiering explains. "Previously, the process required the recording of multiple images of the same scene. The images were then matched and aligned with each other, processed
and then made available for display only on a computer."
--

[LIP]

Planting outside near rose bushes and the like will make it safer, as rose bushes have the same heat signiture as weed. If it's a small grow then you've got nothing to worry about, apart from nosey neighbours, large amounts are obvious though.

[harris7]

The high power lights that the dopers use to grow the drugs generate a large amount of heat. The criminal farmer must vent this heat or the plants will get to hot. We can find the unusually hot exhaust pipe in the roof or the hot room in a house that seems to be hot and cold on a regular cycle (hot when the lights are on cold when they are off). taken from
http://www.predictive-maintenance.com/marijuana.html



and from http://www.predictive-maintenance.com/marijuana.html

spectral contrast between marijuana and other plant canopies appears most significant for green, red edge and short wave infrared wavelengths, however, isolation of marijuana canopy spectral signatures during land cover classification may be difficult using visible-near infrared systems

I don’t know why you are being so hostile. We agree

[mc-blaze21]

well ive just read the whole of this thread and im very impressed. we have some propper smart people amongst us. either that or just too much time on there hands but either way im still impressed. what is it they say u learn something new every day well i think ive learnt enough for a week in this one thread lol. i hope i find alot more discussions like this on here there very informative thank you all even the bloke that made the wise crack at the beggining u no the one kp bitch slapped down lol laters people peace out!

[harris7]

Well I donâ??t want to confront all the misinformation in this thread.

But I will say plants do give off heat. But that isnâ??t the heat we are talking about

I was speaking with a cannabis rights lawyer friend of mine about using infrared detection to find house grow ops.

And GOOD NEWS

It is currently illegal to use these At all in the US on houses
And in Canada they need a Warrant.
As it is considered a search of the premises

But then again whats stopping cops from doing it, detecting you, then watch you till they have â??legalâ?� evidence
and well they like to change laws and not tell us. so how long will this be true

[nitepharmer]

cool thread
what I have read at other grow forum sites is this. Chopper or plane flyovers in the fall happen only in those areas popular to outdoor growing. There are high technology ways to detect marijuana but they cost a fortune and from what I can gather are primarily used in drug interdiction efforts in foriegn countries. The tried and true method that the police use in the United States to find outdoor weed are spotters looking for its distinctive color and christmas tree shape. Not many plants are that bright bright green of marijuana, expecially late in the season. Trained eyeballs is still the best technolgy for finding small grows. The NORMAL site has a list of outdoor marijuana grow busts per state, I think its like five years out of date, but it kind of confirms what I'm saying about the police only doing flyovers in certain areas. There were 7000 outdoor busts in Tennessee and only 29 in Iowa. Any of you hiilbillys want to move?i

[growinforthefuture]

cannabis is not native to a large range of the area it is illegally grown in. In its native habitat it has an infrared color much like that of other herbaceous plants in the area. In higher latitudes a cannabis plant sticks out like a sore thumb. I know all about this stuff, because i work with satellite photos.. We take an infrared satellite image and assign the wavelengths of infrared light, visible colors. Just as cannabis has a bright green distinctive color in the visible spectrum it also gives off a unique color of infrared light.

[growinforthefuture]

btw we do this for tree counts/biology, monitoring urban development and agriculture (for example the mount of certain types of fertilizers can be monitored with infrared.) In fact I mainly deal with archaeological WE DO NOT LOOK FOR GROWS we got like 5 meter resolution anyhow, so to even appear as a pixel a pot plant would have to be the better part of 5 m^2.