SatNOGS DB API

Community-maintained catalog of satellites and their transmitters: frequencies, modes, status. The de facto open frequency database.

Source: https://db.satnogs.org/api/
Access: Public read for satellites, transmitters, modes. TLE and telemetry endpoints need a free account token.
Format: JSON (REST, paginated)

Schema

Field	Type	Note
satellites[].sat_id	string	Stable SatNOGS ID (e.g. GHRO-4462-3925-1731-9723)
satellites[].norad_cat_id	int
satellites[].name, names	string	Primary name plus aliases including OSCAR designation
satellites[].status	enum	alive, dead, future, re-entered
satellites[].launched, deployed, decayed	ISO 8601
satellites[].operator, countries, website	string
transmitters[].uuid	string
transmitters[].type	enum	Transmitter, Transceiver, Transponder
transmitters[].uplink_low / uplink_high	Hz	Range for transponders, single value for transceivers
transmitters[].downlink_low / downlink_high	Hz
transmitters[].mode, uplink_mode	string	FM, LSB, USB, CW, BPSK, GMSK, …
transmitters[].invert	bool	Inverting transponder
transmitters[].baud	float	For digital modes
transmitters[].status	enum	active, inactive, invalid
transmitters[].alive	bool
transmitters[].iaru_coordination	enum	IARU coordinated / uncoordinated / declined
transmitters[].citation	string	Source of the entry

Example

GET https://db.satnogs.org/api/transmitters/?satellite__norad_cat_id=44909
[{"uuid":"...","description":"Linear transponder","alive":true,"type":"Transponder",
  "uplink_low":145935000,"uplink_high":145995000,"uplink_mode":"LSB",
  "downlink_low":435610000,"downlink_high":435670000,"mode":"USB",
  "invert":true,"baud":null,"norad_cat_id":44909,"status":"active",
  "iaru_coordination":"IARU Coordinated", ...}]

Gotchas

Crowd-sourced. Entries can lag reality by months; cross-check status against AMSAT.
Frequencies are integers in Hz.
Pagination is page-number based; total sets exceed a single response.