${api.info.title}${api.info.summary} ${api.info.description} Developer NotesThis page is intended for consumers of the ODS API. If you want to host the API, check the Developer Notes page. Path(s):Example:{ "ods_data": [ { "corr_integ_time_sec": 3, "freq_lower_hz": 26000000000, "freq_upper_hz": 40000000000, "notes": "inAdv:True", "site_el_m": 2124, "site_id": "vla_D", "site_lat_deg": 34.07874917, "site_lon_deg": -107.6177275, "slew_sec": 130.8, "src_dec_j2000_deg": 3.15681115, "src_end_utc": "2023-08-16T15:26:16.000723", "src_id": "J1056+7011", "src_is_pulsar_bool": false, "src_ra_j2000_deg": 126.459743145833, "src_radius": 0, "src_start_utc": "2023-08-16T15:23:47.000541", "trk_rate_dec_deg_per_sec": 0, "trk_rate_ra_deg_per_sec": 0 }, { "corr_integ_time_sec": 3, "freq_lower_hz": 1000000000, "freq_upper_hz": 2000000000, "notes": "inAdv:True", "site_el_m": 2124, "site_id": "vla_D", "site_lat_deg": 34.07874917, "site_lon_deg": -107.6177275, "slew_sec": 11, "src_dec_j2000_deg": 3.7536111111111112, "src_end_utc": "2023-08-16T15:36:16.000723", "src_id": "dm0820+03pair", "src_is_pulsar_bool": false, "src_ra_j2000_deg": 125.24166666666666, "src_radius": 0, "src_start_utc": "2023-08-16T15:26:16.000841", "trk_rate_dec_deg_per_sec": 0, "trk_rate_ra_deg_per_sec": 0 } ] } Target position and celestial movement:ODS data employs Right Ascension (RA) and Declination (Dec) coordinates (src_ra_j2000_deg, src_dec_j2000_deg) to specify the target's position. For sidereal targets, this position remains constant throughout the observation interval. All targets are considered sidereal, except for Solar System bodies and special cases. For non-sidereal targets, the provided coordinates represent the initial position. Subsequent movement within the interval is modeled as linear, with rates of change in RA and Dec specified by the coefficients trk_rate_ra_deg_per_sec and trk_rate_dec_deg_per_sec, respectively. In case of non-sidereal targets with erractic movement, multiple simultaneous positions can be reported to cover the observed area. Current NRAO/GBO facility adoption status:This table is a quick summary of the current NRAO/GBO facilities that have started uploading their observation status to the ODS API, and which satellite operators have started utilizing the ODS data for the Telescope Boresight Avoidance (TBA) technique.
Relevant Publications:The ODS system and TBA technique are described in the following articles and documentation. Peer-reviewed Journals:
Conference Presentations
Coordination Agreements & Announcements
News articles
NRAO/GBO RFI memo seriesODS Community:The ODS system is currently being adopted, developed, and tested independently by the following non-NRAO radio astronomy facilities. Some have already had the Telescope Boresight Avoidance (TBA) engaged by SpaceX:
About:${api.openapi} Contact: ${api.info.contact.email} Acknowledgement:The ODS system was developed by NRAO with support from the National Science Foundation's grants:
Modified on Tuesday, 25-Mar-2025 13:14:50 MDT |