urn:nasa:pds:voyager2_rss_uranus_49xr_raw:geometry:uh0003a 1.0 1.21.0.0 Product_Observational Simpson, R. A. 2025 High-gain antenna pointing for the Voyager 2 encounter with Uranus. This file is an ASCII translation of the original binary file. Because of deficiencies in the documentation, it may not be useful for precise calibration of radio occultation data. 2025-04-09 1.0 The binary source file was recovered from holdings of the Voyager Radio Science Team. The binary (72-bit two's complement floating point) file was converted to ASCII and a PDS4 label was created. 1986-01-24T18:55:00Z 1986-01-25T00:13:36Z Calibration Calibrated High-gain antenna pointing for the Voyager 2 radio science encounter with Uranus (ASCII). Radio Science Voyager Mission urn:nasa:pds:context:investigation:mission.voyager data_to_investigation Voyager 2 Host urn:nasa:pds:context:instrument_host:spacecraft.vg2 is_instrument_host Voyager 2 Engineering Instrument urn:nasa:pds:context:instrument:vg2.eng is_instrument Voyager 2 Equipment urn:nasa:pds:context:instrument_host:spacecraft.vg2 data_to_target urn:nasa:pds:voyager2_rss_uranus_49xr_raw:document:hga_doc data_to_document The referenced product is documentation of the HGA limbtrack maneuver reconstruction and the HGA antenn a pattern. urn:nasa:pds:voyager2_rss_uranus_49xr_raw:geometry:uh0003b data_to_associate The referenced product is the original source binary file. uh0003a.tab 2024-06-03T22:27:00 1093141 2e84b4971e7837e6e7b237e03dc1588f Voyager 2 Uranus - HGA Limbtrack Maneuver Reconstrcution (ASCII) 0 3187 An ASCII table with spacecraft HGA pointing data from the Voyager 2 encounter with Uranus. Each record includes 19 fields: a record number, time at the spacecraft in seconds past 1950.0, five angles measured at the spacecraft (in degrees), and four unit vectors (each with x-y-z components in the EME 50 spacecraft centered coordinate system. Fields have fixed widths; fields are delimited by ASCII commas. The file contains 3187 records, each with 343 bytes; the last two bytes in each record contain the ASCII carriage-return and line-feed characters. NB: The descriptions below are based on the best available documentation; but they include easily recognized errors. For analysis, HGA pointing during the Uranus occultation should be obtained from NAIF SPICE kernels. This file is included primarily for its historic value. Carriage-Return Line-Feed 19 0 343 Record Number 1 1 ASCII_Integer 4 %4d Number of the record, starting from 1. Spacecraft Event Time 2 6 ASCII_Real 18 %18.6f second Spacecraft Event Time in seconds since 1950.0. Angle Between HGA Boresight and Virtual Image of Earth 3 25 ASCII_Real 17 %17.13f degree The angle between the HGA boresight and virtual image of Earth during the observations. Angle Between Earth and Its Virtual Image 4 43 ASCII_Real 17 %17.13f degree The angle between the true direction to Earth and and the direction to its image as viewed from the spacecraft. Angle Between Uranus and Earth IVirtual mage 5 61 ASCII_Real 17 %17.13f degree The angle between the direction to Uranus and the direction to the image of Earth as seen from the spacecraft. Angle Between HGA Boresight and Earth 6 79 ASCII_Real 17 %17.13f degree Angle between the HGA boresight and the true direction to Earth. Angle Between Uranus and Earth 7 97 ASCII_Real 17 %17.13f degree Angle between Uranus and the true direction to Earth as seen from the spacecraft during the observations. Earth Virtual Image X-Component 8 115 ASCII_Real 18 %18.15f The x-component of the unit vector from Voyager 2 to the virtual image of Earth in the EME50 spacecraft-centered coordinate system. Earth Virtual Image Y-Component 9 134 ASCII_Real 18 %18.15f The y-component of the unit vector from Voyager 2 to the virtual image of Earth in the EME50 spacecraft-centered coordinate system. Earth Virtual Image Z-Component 10 153 ASCII_Real 18 %18.15f The z-component of the unit vector from Voyager 2 to the virtual image of Earth in the EME50 spacecraft-centered coordinate system. HGA Boresight Pointing Vector X-Component 11 172 ASCII_Real 18 %18.15f The x-component of the high-gain antenna unit pointing vector in the EME50 spacecraft-centered coordinate system. HGA Boresight Pointing Vector Y-Component 12 191 ASCII_Real 18 %18.15f The y-component of the high-gain antenna unit pointing vector in the EME50 spacecraft-centered coordinate system. HGA Boresight Pointing Vector Z-Component 13 210 ASCII_Real 18 %18.15f The z-component of the high-gain antenna unit pointing vector in the EME50 spacecraft-centered coordinate system. Earth Unit Vector X-Component 14 229 ASCII_Real 18 %18.15f The x-component of the unit vector to Earth from the spacecraft in the EME50 spacecraft-centered coordinate system. Earth Unit Vector Y-Component 15 248 ASCII_Real 18 %18.15f The y-component of the unit vector to Earth from the spacecraft in the EME50 spacecraft-centered coordinate system. Earth Unit Vector Z-Component 16 267 ASCII_Real 18 %18.15f The z-component of the unit vector to Earth from the spacecraft in the EME50 spacecraft-centered coordinate system. Uranus Unit Vector X-Component 17 286 ASCII_Real 18 %18.15f The x-component of the unit vector to Uranus from the spacecraft in the EME50 spacecraft-centered coordinate system. Uranus Unit Vector Y-Component 18 305 ASCII_Real 18 %18.15f The y-component of the unit vector to Uranus from the spacecraft in the EME50 spacecraft-centered coordinate system. Uranus Unit Vector Z-Component 19 324 ASCII_Real 18 %18.15f The z-component of the unit vector to Uranus from the spacecraft in the EME50 spacecraft-centered coordinate system.