Updated readme and added notes
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## satExplore
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## satExplore
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Repository in which me(LZ1BUK) and LZ1TIN document our amateur radio astronomy projects. Expect pictures, reports, recordings, etc. Only folder you should ignore in this repo is the `assets/` folder
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Repository in which me(LZ1BUK) and LZ1TIN document our amateur radio astronomy projects. Expect pictures, reports, recordings, etc. Only folder you should ignore in this repo is the `assets/` folder
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For future plans [check out plans.md](notes/plans.md)
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### Hardware we use
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### Hardware we use
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We have the HTs needed for VHF/UHF communication, but specifically for satellites we use:
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We have the HTs needed for VHF/UHF communication, but specifically for satellites we use:
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@ -11,3 +12,5 @@ We have the HTs needed for VHF/UHF communication, but specifically for satellite
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* SDR++ - an SDR interface
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* SDR++ - an SDR interface
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* NOAA APT - a NOAA image decoder
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* NOAA APT - a NOAA image decoder
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* wxtoimg - a satellite image decoder
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* wxtoimg - a satellite image decoder
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* gpredict - Satellite position predictor for linux
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* Heavens Above - Satellite position predictor for android
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57
notes/plans.md
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notes/plans.md
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## Interesting satellites
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[Data gathered from here](https://amsat.org)
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### FM Repeaters
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* [ ] ISS
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* [ ] SO-50
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* SO-50 carries several experiments, including a mode J FM amateur repeater experiment operating on 145.850 MHz uplink and 436.795 MHz downlink. The repeater is available to amateurs worldwide as power permits, using a 67.0 Hertz PL tone on the uplink, for on-demand activation. SO-50 also has a 10 minute timer that must be armed before use. Transmit a 2 second carrier with a PL tone of 74.4 to arm the timer.
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* [ ] AO-91/92
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* [ ] EO-80
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* FM Voice Repeater
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* 435.080 MHz 210.7 HZ PL Tone Uplink
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* 145.840 MHz Downlink (also 9k6 FSK data)
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* 145.880 MHz 1k2 BPSK or CW Telemetry
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### Telemetry
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* [ ] Stars-1
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* [Info here](https://www.amsat.org/beaconclosed-satellites/stars-1-space-tethered-autonomous-robotic-satellite/)
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* Downlink (Mother):
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* 437.305 (CW)
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* 437.485 (FM AX25)
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* Uplink (Mother):
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* 144 MHZ (AX25 command only)
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* Downlink (Daughter):
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* 437.275 (CW)
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* 437.465 (FM AX25)
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* Uplink
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* 144 MHZ (AX25 command only)
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* [ ] ShindaiSat
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* [Info here](https://www.amsat.org/beaconclosed-satellites/shindaisat-ginrei/)
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* Downlink:
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* 437.485 (X.251k2 AFSK)
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* Downlink:
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* 437.305 (CW Beacon)
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* [ ] 50SAT
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* [Info](https://www.amsat.org/50sat-mo-76/)
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* 437.505 MHz
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* Modes
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* FM slow Morse callsign beacon
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* FM fast Morse telemetry
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* FSK RTTY telemetry
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* 1kbps data
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### Weather satellites
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* [x] NOAA 19
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* [ ] NOAA 15
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* [ ] NOAA 18
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* [ ] METEOR M2
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* [ ] ADEOS II
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notes/quickstart.md
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## Quickstart
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### Different types of orbit
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* LEO
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* Low Earth Orbit (160-2000km) -> A couple of minutes
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* MEO
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* Medium -""-(2000-35785 km) -> GPS
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* GEO
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* Geostationary orbit (above) -> Seems stationary but is actually moving with us
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### Satellite types
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* FM Repeaters
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* uplink on one band and downlink on another, so most optimally you need two antennas
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* SO-50, AO-91, AO-92
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* Linear transponders - Usually SSB and CW
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* Transmit LSB and receive USB
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* OSCAR-7, FO-29, AO-73
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* Digital relay
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* Like BBS
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* FalconSAT-3
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### Doppler shift
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* Upward shift when approaching
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* Downward shift when departing
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### Terminology
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| Abbreviation/Term | Translation |
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| ----------------------------- | ------------------------------------------------------------ |
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| AOS (Acquisition of Signal) | Time that a satellite rises above the horizon |
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| TCA(Time of closest apporach) | Time when the satellite is closest and Doppler shift is zero. Maximum elevation. |
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| LOS(Loss of signal) | When satellite is no longer reachable |
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| Footprint | Ground area - coverage |
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| Uplink | Earth to Space |
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| Downlink | Space to Earth |
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### [AMSAT satellites info](https://www.amsat.org/status/)
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### ISS info
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* [SSTV Cards](https://ariss-sstv.blogspot.com/)
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* [Certificate application](https://www.spaceflightsoftware.com/ARISS_SSTV/submit.php)
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* [Certificate #2](https://ariss.pzk.org.pl/sstv/#award_rules_en)
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* [Repeater information](https://www.ariss.org/current-status-of-iss-stations.html)
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