${api.info.title}

${api.info.summary}

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Developer Notes

This 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.

Adopters:

The ODS system is currently being adopted and tested independently by the following non-NRAO radio astronomy facilities:

• Hat Creek Radio Observatory (HCRO-ODS)

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:

• SII NRDZ: Dynamic Protection and Spectrum Monitoring for Radio Observatories (AST-2232159),
• SWIFT-SAT: Observational Data Sharing (AST-2332422)

Copyright © 2009 Associated Universities, Inc.
The National Radio Astronomy Observatory is a facility of the National Science Foundation operated under cooperative agreement by Associated Universities, Inc.