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TLE's in data of LEO sats
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R. Alblas
As far as I understand in Satpy position of each pixel is done using a table present in the data files (not only subsat but also in 'x'-direction).
Each Metop file also contains TLE info, making it possible to predict a track (for e.g. a full day) by extract this info from just one file per day. Meaning that collecting TLE from other sources isn't necessary. Question is if other LEO-sats also contain TLE's; I couldn't find that. Did anyone have a look at this? Regards, Rob. |
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On 18/11/2022 09:14, R. Alblas wrote:
As far as I understand in Satpy position of each pixel is done using aI don't think it's in the raw NOAA/AVHRR data, Rob, but you would know that anyway! EUMETSAT have Kepler data available via HTTPS (IIRC). https://service.eumetsat.int/tle/data_out/ Cheers, David -- SatSignal Software - Quality software for you Web: https://www.satsignal.eu Email: david-taylor@... Twitter: @gm8arv |
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Jeskynar
Positions are not normally transmitted in the raw data, only in post-processed data. MetOp are the only ones to send TLEs and they even do it for non-MetOp satellites, very thoughtful. Aqua is the only other one to provide some position data but I think it just relays some GPS determinants. I don't remember right now if the newer ones have similar. On Fri, 18 Nov 2022, 09:14 R. Alblas, <sat@...> wrote: As far as I understand in Satpy position of each pixel is done using a |
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R. Alblas
David, It's indeed not in the directly received files, only in
post-processed files coming via Eumetcast or Internet (Eumetsat
Data Store). Jeskynar, All post-processed data of satellites supported by satpy (so also GOES, FY3D, Sentinel, Aqua, Terra) must have some way of position data, otherwise it would be impossible for satpy to map the data to the right places-on-earth. Added TLE's makes it possible to do an easy prediction of the track for some time, by opening just one file instead of opening all files of a day and extracting the sub-sat positions. Cheers, Rob.
On 18-11-2022 10:55, Jeskynar wrote:
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