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XT2 Spot Temperatures way off!
837 4 2019-2-21
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ISeeIt.ca
lvl.2
Canada
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I recently did a job (M600/RTK/XT2) and had great success. The images were excellent.

The problem was the spot temperatures. When I compared my XT2 radiometric still spot temperatures with the exact same shot but with a FLIR T660 (top of the line handheld) my XT2 temperature were off by about -8C.

i.e.
T660 - image shows temperatures ranging from -3.6C to -5.1C. with an outside temperature was about -7C.
XT2 - image shows temperatures ranging from -11.7C to -13.3C. outside temperature was about -7C

For qualitative analysis no big deal as you are mainly looking for hot/cold signatures.
For quantitative analysis temperatures are needed and should be accurate.

Any reason why I'm getting this discrepancy?
They are both FLIR 640 x 512 sensors.

TIA
Rick
2019-2-21
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broadlandboy
Captain
Flight distance : 1654222 ft
United Kingdom
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Were the distances from sensor to target the same. As I seem to recall that the more space /air between the target & sensor will effect the temp reading.
2019-2-21
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ISeeIt.ca
lvl.2
Canada
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They were pretty much the same distance but it should matter. These two sensors are 640x512 and should be able to get accurate temperature data from this distance, 100’.

I’ve been pinging FLIR for 2 weeks now and no body is answering.

I can’t believe this is normal.
Got this new camera last May.
2019-2-22
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fansd05c012d
lvl.1
Canada
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Hello. Did you get any answers? I am having the same problem and it's just waay too off!
2019-8-27
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broadlandboy
Captain
Flight distance : 1654222 ft
United Kingdom
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Dji give a + - 10degees C  as acceptable.
Waiting the return , after 3 months, of my XT2 from DJI, & Flir, due to in accuracy
2019-8-27
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