4. ODS Data Format

4.1. Latest JSON fields

For the latest ODS JSON Schema, see Live JSON schema v1.0.0

Also, here is the auto-generated FastAPI documentation

See Changelog for the comprehensive JSON Schema Change History.

Field name	Required^	Type	Constraints	Units	Description
corr_integ_time_sec	FALSE	float	x >= 0	seconds	integration time of the raw spectra. Used to estimate power and noise temperature
dish_diameter_m	TRUE	float	x >= 0	meters	diameter of the dish
freq_lower_hz	TRUE	float	x >= 0	Hertz	lower limit frequency used during this interval
freq_upper_hz	TRUE	float	x >= 0	Hertz	upper limit frequency used during this interval
site_el_m	TRUE	float		meters	elevation of the instrument
site_id	TRUE	string			identifier of the instrument
site_lat_deg	TRUE	float	-90 <= x <= 90	decimal-degrees +/- DDD.D	latitude of the instrument
site_lon_deg	TRUE	float	-180 <= x <= 180	decimal-degrees +/- DDD.D	longitude of the instrument
slew_sec	TRUE	float	x >= 0	seconds	time taken for instrument to reach source
src_dec_j2000_deg	TRUE	float	-90 <= x <= 90	decimal-degrees +/- DDD.D	declination of source/target
src_end_utc	TRUE	datetime		UTC Datetime	end time of this observing interval in UTC
src_id	FALSE	string			internal identifier of source/target
src_ra_j2000_deg	TRUE	float	0 <= x <= 360	decimal-degrees +/- DDD.D	right ascension of the source/target
src_start_utc	TRUE	datetime		UTC Datetime	start time of this observing interval
subarray	FALSE	integer			subarray number of instrument
trk_rate_dec_deg_per_sec	TRUE	float		decimal-degrees +/- DDD.D	declination tracking of src, defaults to 0
trk_rate_ra_deg_per_sec	TRUE	float		decimal-degrees +/- DDD.D	right ascension tracking of src, defaults to 0
version	TRUE	string			version of this file

^Required = if TRUE, the value should exist when the API return to the external client. If FALSE, the value may or may not exist when being queried.

Disclaimer: Except the ODS JSON schema, the NRAO ODS server, code, and data are not currently available for public consumption. Feel free to contact us and we will review it on a case-by-case basis.