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https://github.com/akhenakh/sataas
Satellites As A Service
https://github.com/akhenakh/sataas
go orbital-mechanics orbitaorbital-simulation satellites sgp4 space
Last synced: 11 days ago
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Satellites As A Service
- Host: GitHub
- URL: https://github.com/akhenakh/sataas
- Owner: akhenakh
- License: apache-2.0
- Created: 2020-04-09T11:38:12.000Z (over 4 years ago)
- Default Branch: main
- Last Pushed: 2023-03-05T02:32:28.000Z (over 1 year ago)
- Last Synced: 2024-10-16T03:43:09.326Z (23 days ago)
- Topics: go, orbital-mechanics, orbitaorbital-simulation, satellites, sgp4, space
- Language: Go
- Size: 1.75 MB
- Stars: 8
- Watchers: 3
- Forks: 0
- Open Issues: 20
-
Metadata Files:
- Readme: README.md
- License: LICENSE
Awesome Lists containing this project
README
## SatAAS
Satellites As A Service
## API WIP
API exported via gRPC.
```proto
service Prediction {
// Categories returns all known categories with norad numbers
rpc Categories (google.protobuf.Empty) returns (CategoriesResponse) {}
// SatsInfos returns norad number and tles for active sats
rpc SatsInfos (SatsRequest) returns (SatsInfosResponse) {}
// SatsLocations returns a stream of locations for a list of sats or a category
rpc SatsLocations (SatsRequest) returns (stream SatsLocationsResponse) {}
// SatLocationFromObs returns a stream of observations from a location for a list of sats or a category
rpc SatLocationFromObs (SatLocationFromObsRequest) returns (stream Observation) {}
// GenLocations returns the predicted locations for a list of sats or a category
rpc GenLocations(GenLocationsRequest) returns (GenLocationsResponse) {}
// GenPasses returns the predicted passes for a sat
rpc GenPasses(GenPassesRequest) returns (Passes) {}
}
```
## Example
Start the server
```sh
make sataas && ./cmd/sataas/sataas
```
## Example tools provided
- Getting International space station location & compute passes for the next 2h & get a live stream of the position
```sh
./cmd/satcli/satcli -lat=46.83 -lng=-71.25 -noradNumber=25544 -duration=2h
2020/05/03 22:18:35 Sat norad_number:25544 name:"ISS (ZARYA)" tle1:"1 25544U 98067A 20124.73419492 .00000752 00000-0 21557-4 0 9996" tle2:"2 25544 51.6446 208.4853 0001149 231.1370 266.9719 15.49344194225126" update_time:
2020/05/03 22:18:35 Location latitude:-1.023585595854026 longitude:-51.195516207358374 altitude:419.98553195727436
2020/05/03 22:18:35 Passes to 2020-05-04 00:18:35.698505 -0400 EDT m=+7200.005970072:
"passes: los: aos_azimuth:291.29683639401554 los_azimuth:91.28806140765137 max_elevation:40.168053684422446 aos_range_rate:-6.72311220577045 los_range_rate:6.727437896026004 > passes: los: aos_azimuth:294.8517672977992 los_azimuth:91.28806140765137 max_elevation:-5.729577951308175e+15 aos_range_rate:-6.8810715601595875 los_range_rate:6.727437896026004 > "
2020/05/03 22:18:36 Latitude : -0.94 Longitude : -51.13 Altitude: 420.0km
Azimuth : 154 Elevation -21.6 Range: 5654.2km RangeRage: -3.859895
2020/05/03 22:18:37 Latitude : -0.89 Longitude : -51.10 Altitude: 420.0km
Azimuth : 154 Elevation -21.6 Range: 5650.4km RangeRage: -3.856864
^C
```
- Get all Starlink satellites positions
```sh
./cmd/starlink/starlink
2020/06/15 22:19:18 ID: 44724 Latitude : -23.21 Longitude : 119.74 Altitude: 556.5km
2020/06/15 22:19:18 ID: 44723 Latitude : 9.01 Longitude : -72.19 Altitude: 550.0km
2020/06/15 22:19:18 ID: 44722 Latitude : 52.66 Longitude : 0.14 Altitude: 555.4km
...
^C
```
## Tech
`cppsgp4` is swig wrapped from the [sgp4 c++ library](https://github.com/dnwrnr/sgp4).
`sgp4` is a wrapper to handle c++ exceptions into Go errors, and a Goish API.
The gRPC is exposed as pure gRPC and as grpc-web on the same port.
## Update bindings
```
swig -c++ -intgosize 64 -go SGP4.i
```
## Self Promo
Check my iOS app [SatSat](https://satsat.inair.space/), it's free and offers Satellites passes predictions.
## TLE data
https://digitalarsenal.io/data/all.txt
https://celestrak.com/NORAD/elements/active.txt
http://www.amsat.org/amsat/ftp/keps/current/nasabare.txt
Beacons: http://www.ne.jp/asahi/hamradio/je9pel/satslist.csv
https://www.ucsusa.org/resources/satellite-database
https://www.wmo-sat.info/oscar/satellitefrequencies
https://db.satnogs.org/api/
## On going
https://gis.stackexchange.com/questions/77651/how-to-find-ring-of-coverage-of-gps-satellite-on-wgs-84-ellipsoid
https://rogchap.com/2019/07/26/in-process-grpc-web-proxy/