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gut-space / svarog

📡 A ground stations network for receiving satellite transmissions, using VHF, UHF, and more.
MIT License
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Fix TCA values #33

Open tomaszmrugalski opened 3 years ago

tomaszmrugalski commented 3 years ago

Right now the station uploads TCA values equal to AOS. This is clearly incorrect. There are two tasks to do here:

  1. [x] correct the upload script
  2. [ ] correct existing entries in the DB
tomaszmrugalski commented 3 years ago

On a second thought, maybe a better approach would be to get rid of TCA completely? Since the orbits we're dealing with are nearly circular, we can use basic formula to calculate it TCA = (AOS + LOS)/2.

fivitti commented 3 years ago

It may be not right that TCA is average of LOS and AOS. In our context AOS and LOS means start and stop recording. We use a strategy which slice of pass should be record. TCA may be not recorded.

For example: NOAA 15 has real AOS at 12:00 and LOS 13:00. TCA is 12:30. But we also have a pass of Meteor with real AOS 12:20 and LOS 13:00 (TCA 12:40). Meteor has better quality pass (centrally over station). Then strategy select for record:

We insert these times as AOS and LOS. In this case the closest point to station (TCA) of NOAA 15 will be at 12:20.

tomaszmrugalski commented 3 years ago

The observation submission is now improved, see commit 59e2c55224de7b702c704f4f25450b30618d6b50 on #45. It's not a proper TCA, just an average between start of observation and LOS. It's improvement, but not a complete fix.