urn:nasa:pds:voyager2_rss_uranus_49xr_raw:geometry:uh0003b 1.0 1.21.0.0 Product_Observational Simpson, R. A. 2025 High-gain antenna pointing for the Voyager 2 encounter with Uranus. Two's complement binary: 18 72-bit floating point numbers per record. Because of deficiencies in the documentation, it may not be useful for precise calibration of radio occultation data. 2025-04-09 1.0 This data file has been recovered from holdings of the Voyager Radio Science Team. A PDS4 label was created as part of the process. 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 (binary). 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 HGA pattern. urn:nasa:pds:voyager2_rss_uranus_49xr_raw:geometry:uh0003a data_to_associate The referenced product is an ASCII translation of this binary file. uh0003b.dat 2024-05-29T07:08:00 803376 d53c4a56b0c6b0e8f386d09677e758e5 Voyager 2 Uranus - HGA Limbtrack Reconstruction (binary) 0 3187 A binary table with spacecraft HGA pointing data from the Voyager 2 encounter with Uranus. Each record comprises 18 fields each with a Univac 72-bit floating point two's complement value. The first 36 bits and the last 684 bits of each record are undefined. Record 3188 contains zeros and is not part of this table specification. Angles are in degrees; unit vectors are in the EME 50 spacecraft centered copordinate system. 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. 1 0 252 Container for 18 non-standard binary double precision values 1 1 UnsignedBitString 252 54 Spacecraft Event Time - Sign 1 37 37 UnsignedBitString The first quantity in the record is the Spacecraft Event Time (SCET) in seconds from 1950.0. This bit field contains the sign bit for the SCET; "0" indicates a positive sign (expected); "1" indicates a negative sign. Spacecraft Event Time - Exponent 2 38 48 UnsignedBitString The first quantity in the record is the Spacecraft Event Time (SCET) in seconds from 1950.0. This field of 11 bits contains the exponent (EXP) for the SCET value. The exponent is biased by 1024; after removing the bias, the result is used to create the factor 2**(EXP-1024). Hexadecimal values in this field are expected to be "41F" (binary 10000011111, decimal 1055). Spacecraft Event Time - Mantissa 3 49 108 UnsignedBitString The first quantity in the record is the Spacecraft Event Time (SCET) in seconds from 1950.0. These 60 bits contain the mantissa for the SCET value. The first bit in the mantissa is the bit representing 2**-1, the second is the bit representing 2**-2, etc. The hexadecimal mantissa for the first record in this file is "87ACF0080000000". The corresponding SCET -- combining the sign bit, the exponent factor 2**(EXP-1024), and the mantissa -- is 1138128900 seconds from 1950.0 (or 1986-01-24T18:55:00 at the spacecraft). Angle: HGA Boresight to Virtual Image of Earth - Sign 4 109 109 UnsignedBitString The second quantity in the record is the angle between the HGA boresight and the virtual image of Earth (in degrees). This is the sign bit for that angle; "0" indicates a positive sign (expected); "1" indicates a negative sign. Angle: HGA Boresight to Virtual Image of Earth - Exponent 5 110 120 UnsignedBitString The second quantity in the record is the angle between the HGA boresight and the virtual image of Earth (in degrees). These 11 bits contain the exponent for the HGA to virtual image angle value. The exponent is biased by 1024; after removing the bias, the result is used to create the factor 2**(EXP-1024). Angle: HGA Boresight to Virtual Image of Earth - Mantissa 6 121 180 UnsignedBitString The second quantity in the record is the angle between the HGA boresight and the virtual image of Earth (in degrees). These 60 bits contain the mantissa for that angle. The first bit in the mantissa is the bit representing 2**-1, the second is the bit representing 2**-2, etc. The corresponding angle value is the product of the exponent factor 2**(EXP-1024) and the mantissa with the appropriate sign attached. Angle: Earth to Virtual Image of Earth - Sign 7 181 181 UnsignedBitString The third quantity in the record is the angle between the Earth and the virtual image of Earth (in degrees) at the spacecraft. This is the sign bit for that angle; "0" indicates a positive sign (expected); "1" indicates a negative sign. Angle: Earth to Virtual Image of Earth - Exponent 8 182 192 UnsignedBitString The third quantity in the record is the angle between the Earth and the virtual image of Earth (in degrees) at the spacecraft. These 11 bits contain the exponent (EXP) for value of that angle. The exponent is biased by 1024; after removing the bias, the result is used to create the factor 2**(EXP-1024). Angle: Earth to Virtual Image of Earth - Mantissa 9 193 252 UnsignedBitString The third quantity in the record is the angle between the Earth and the virtual image of Earth (in degrees) at the spacecraft. These 60 bits contain the mantissa for that angle. The first bit in the mantissa is the bit representing 2**-1, the second is the bit representing 2**-2, etc. The corresponding angle value is the product of the exponent factor 2**(EXP-1024) and the mantissa with the appropriate sign attached. Angle: Uranus to Virtual Image of Earth - Sign 10 253 253 UnsignedBitString The fourth quantity in the record is the angle between Uranus and the virtual image of Earth (in degrees) at the spacecraft. This is the sign bit for that angle; "0" indicates a positive sign (expected); "1" indicates a negative sign. Angle: Uranus to Virtual Image of Earth - Exponent 11 254 264 UnsignedBitString The fourth quantity in the record is the angle between Uranus and the virtual image of Earth (in degrees) at the spacecraft. These 11 bits contain the exponent (EXP) for value of that angle. The exponent is biased by 1024; after removing the bias the result is used to create the factor 2**(EXP-1024). Angle: Uranus to Virtual Image of Earth - Mantissa 12 265 324 UnsignedBitString The fourth quantity in the record is the angle between Uranus and the virtual image of Earth (in degrees) at the spacecraft. These 60 bits contain the mantissa for the Uranus to virtual image angle. The first bit in the mantissa is the bit representing 2**-1, the second is the bit representing 2**-2, etc. The corresponding angle value is the product of the exponent factor 2**(EXP-1024) and the mantissa with the appropriate sign attached. Angle: HGA Boresight to Earth - Sign 13 325 325 UnsignedBitString The fifth quantity in the record is the angle between the HGA boresight and the Earth (in degrees) at the spacecraft. This is the sign bit for that angle; "0" indicates a positive sign (expected); "1" indicates a negative sign. Angle: HGA Boresight to Earth - Exponent 14 326 336 UnsignedBitString The fifth quantity in the record is the angle between the HGA boresight and the Earth (in degrees) at the spacecraft. These 11 bits contain the exponent for the value of that angle. The exponent is biased by 1024; after removing the bias the result is used to create the factor 2**(EXP-1024). Angle: HGA Boresight to Earth - Mantissa 15 337 396 UnsignedBitString The fifth quantity in the record is the angle between the HGA boresight and the Earth (in degrees) at the spacecraft. These 60 bits contain the mantissa for that angle. The first bit in the mantissa is the bit representing 2**-1, the second is the bit representing 2**-2, etc. The corresponding angle value is the product of the exponent factor 2**(EXP-1024) and the mantissa with the appropriate sign attached. Angle: Uranus to Earth - Sign 16 397 397 UnsignedBitString The sixth quantity in the record is the angle between Uranus and the Earth (in degrees) at the spacecraft. This is the sign bit for that angle; "0" indicates a positive sign (expected); "1" indicates a negative sign. Angle: Uranus to Earth - Exponent 17 398 408 UnsignedBitString The sixth quantity in the record is the angle between Uranus and the Earth (in degrees) at the spacecraft. These 11 bits contain the exponent for the value of that angle. The exponent is biased by 1024; after removing the bias the result is used to create the factor 2**(EXP-1024). Angle: Uranus to Earth - Mantissa 18 409 468 UnsignedBitString The sixth quantity in the record is the angle between Uranus and the Earth (in degrees) at the spacecraft. These 60 bits contain the mantissa for that angle. The first bit in the mantissa is the bit representing 2**-1, the second is the bit representing 2**-2, etc. The corresponding angle value is the product of the exponent factor 2**(EXP-1024) and the mantissa with the appropriate sign attached. Unit Vector: Virtual Image of Earth, x-component - Sign 19 469 469 UnsignedBitString The seventh quantity in the record is the x-component of the unit vector from the spacecraft to the virtual image of Earth. This is the sign bit for that component; "0" indicates a positive sign; "1" indicates a negative sign. Unit Vector: Virtual Image of Earth, x-component - Exponent 20 470 480 UnsignedBitString The seventh quantity in the record is the x-component of the unit vector from the spacecraft to the virtual image of Earth. These 11 bits contain the exponent for the value of that angle. The exponent is biased by 1024; after removing the bias the result is used to create the factor 2**(EXP-1024). Unit Vector: Virtual Image of Earth, x-component - Mantissa 21 481 540 UnsignedBitString The seventh quantity in the record is the x-component of the unit vector from the spacecraft to the virttual image of Earth. These 60 bits contain the mantissa for that angle. The first bit in the mantissa is the bit representing 2**-1, the second is the bit representing 2**-2, etc. The corresponding value is the product of the exponent factor 2**(EXP-1024) and the mantissa with the appropriate sign attached. Unit Vector: Virtual Image of Earth, y-component - Sign 22 541 541 UnsignedBitString The eighth quantity in the record is the y-component of the unit vector from the spacecraft to the virtual image of Earth. This is the sign bit for that component; "0" indicates a positive sign; "1" indicates a negative sign. Unit Vector: Virtual Image of Earth, y-component - Exponent 23 542 552 UnsignedBitString The eighth quantity in the record is the y-component of the unit vector from the spacecraft to the virtual image of Earth. These 11 bits contain the exponent for the value of that angle. The exponent is biased by 1024; after removing the bias the result is used to create the factor 2**(EXP-1024). Unit Vector: Virtual Image of Earth, y-component - Mantissa 24 553 612 UnsignedBitString The eighth quantity in the record is the y-component of the unit vector from the spacecraft to the virtual image of Earth. These 60 bits contain the mantissa for that angle. The first bit in the mantissa is the bit representing 2**-1, the second is the bit representing 2**-2, etc. The corresponding value is the product of the exponent factor 2**(EXP-1024) and the mantissa with the appropriate sign attached. Unit Vector: Virtual Image of Earth, z-component - Sign 25 613 613 UnsignedBitString The ninth quantity in the record is the z-component of the unit vector from the spacecraft to the virtual image of Earth. This is the sign bit for that component; "0" indicates a positive sign; "1" indicates a negative sign. Unit Vector: Virtual Image of Earth, z-component - Exponent 26 614 624 UnsignedBitString The ninth quantity in the record is the z-component of the unit vector from the spacecraft to the virtual image of Earth. These 11 bits contain the exponent for the value of that angle. The exponent is biased by 1024; after removing the bias the result is used to create the factor 2**(EXP-1024). Unit Vector: Virtual Image of Earth, z-component - Mantissa 27 625 684 UnsignedBitString The ninth quantity in the record is the z-component of the unit vector from the spacecraft to the virtual image of Earth. These 60 bits contain the mantissa for that angle. The first bit in the mantissa is the bit representing 2**-1, the second is the bit representing 2**-2, etc. The corresponding value is the product of the exponent factor 2**(EXP-1024) and the mantissa with the appropriate sign attached. Unit Vector: HGA Boresight, x-component - Sign 28 685 685 UnsignedBitString The tenth quantity in the record is the x-component of the HGA boresight unit vector. This is the sign bit for that component; "0" indicates a positive sign; "1" indicates a negative sign. Unit Vector: HGA Boresight, x-component - Exponent 29 686 696 UnsignedBitString The tenth quantity in the record is the x-component of the HGA boresight unit vector. These 11 bits contain the exponent for that component. The exponent is biased by 1024; after removing the bias, the result is used to create the factor 2**(EXP-1024). Unit Vector: HGA Boresight, x-component - Mantissa 30 697 756 UnsignedBitString The tenth quantity in the record is the x-component of the HGA boresight unit vector. These 60 bits contain the mantissa for that component. The first bit in the mantissa is the bit representing 2**-1, the second is the bit representing 2**-2, etc. The corresponding value is the product of the exponent factor 2**(EXP-1024) and the mantissa with the appropriate sign attached. Unit Vector: HGA Boresight, y-component - Sign 31 757 757 UnsignedBitString The eleventh quantity in the record is the y-component of the HGA boresight unit vector. This is the sign bit for that component; "0" indicates a positive sign; "1" indicates a negative sign. Unit Vector: HGA Boresight, y-component - Exponent 32 758 768 UnsignedBitString The eleventh quantity in the record is the y-component of the HGA boresight unit vector. These 11 bits contain the exponent for that component. The exponent is biased by 1024; after removing the bias, the result is used to create the factor 2**(EXP-1024). Unit Vector: HGA Boresight, y-component - Mantissa 33 769 828 UnsignedBitString The eleventh quantity in the record is the y-component of the HGA boresight unit vector. These 60 bits contain the mantissa for that component. The first bit in the mantissa is the bit representing 2**-1, the second is the bit representing 2**-2, etc. The corresponding value is the product of the exponent factor 2**(EXP-1024) and the mantissa with the appropriate sign attached. Unit Vector: HGA Boresight, z-component - Sign 34 829 829 UnsignedBitString The twelfth quantity in the record is the z-component of the HGA boresight unit vector. This is the sign bit for that component; "0" indicates a positive sign; "1" indicates a negative sign. Unit Vector: HGA Boresight, z-component - Exponent 35 830 840 UnsignedBitString The twelfth quantity in the record is the z-component of the HGA boresight unit vector. These 11 bits contain the exponent for that component. The exponent is biased by 1024; after removing the bias, the result is used to create the factor 2**(EXP-1024). Unit Vector: HGA Boresight, z-component - Mantissa 36 841 900 UnsignedBitString The twelfth quantity in the record is the z-component of the HGA boresight unit vector. These 60 bits contain the mantissa for that component. The first bit in the mantissa is the bit representing 2**-1, the second is the bit representing 2**-2, etc. The corresponding value is the product of the exponent factor 2**(EXP-1024) and the mantissa with the appropriate sign attached. Unit Vector: Earth, x-component - Sign 37 901 901 UnsignedBitString The thirteenth quantity in the record is the x-component of the unit vector from the spacecraft to Earth. This is the sign bit for that component; "0" indicates a positive sign; "1" indicates a negative sign. Unit Vector: Earth, x-component - Exponent 38 902 912 UnsignedBitString The thirteenth quantity in the record is the x-component of the unit vector from the spacecraft to Earth. These 11 bits contain the exponent for that component. The exponent is biased by 1024; after removing the bias, the result is used to create the factor 2**(EXP-1024). Unit Vector: Earth, x-component - Mantissa 39 913 972 UnsignedBitString The thirteenth quantity in the record is the x-component of the unit vector from the spacecraft to Earth. These 60 bits contain the mantissa for that component. The first bit in the mantissa is the bit representing 2**-1, the second is the bit representing 2**-2, etc. The corresponding value is the product of the exponent factor 2**(EXP-1024) and the mantissa with the appropriate sign attached. Unit Vector: Earth, y-component - Sign 40 973 973 UnsignedBitString The fourteenth quantity in the record is the y-component of the unit vector from the spacecraft to Earth. This is the sign bit for that component; "0" indicates a positive sign; "1" indicates a negative sign. Unit Vector: Earth, y-component - Exponent 41 974 984 UnsignedBitString The fourteenth quantity in the record is the y-component of the unit vector from the spacecraft to Earth. These 11 bits contain the exponent for that component. The exponent is biased by 1024; after removing the bias, the result is used to create the factor 2**(EXP-1024). Unit Vector: Earth, y-component - Mantissa 42 985 1044 UnsignedBitString The fourteenth quantity in the record is the y-component of the unit vector from the spacecraft to Earth. These 60 bits contain the mantissa for that component. The first bit in the mantissa is the bit representing 2**-1, the second is the bit representing 2**-2, etc. The corresponding value is the product of the exponent factor 2**(EXP-1024) and the mantissa with the appropriate sign attached. Unit Vector: Earth, z-component - Sign 43 1045 1045 UnsignedBitString The fifteenth quantity in the record is the z-component of the unit vector from the spacecraft to Earth. This is the sign bit for that component; "0" indicates a positive sign; "1" indicates a negative sign. Unit Vector: Earth, z-component - Exponent 44 1046 1056 UnsignedBitString The fifteenth quantity in the record is the z-component of the unit vector from the spacecraft to Earth. These 11 bits contain the exponent for that component. The exponent is biased by 1024; after removing the bias, the result is used to create the factor 2**(EXP-1024). Unit Vector: Earth, z-component - Mantissa 45 1057 1116 UnsignedBitString The fifteenth quantity in the record is the z-component of the unit vector from the spacecraft to Earth. These 60 bits contain the mantissa for that component. The first bit in the mantissa is the bit representing 2**-1, the second is the bit representing 2**-2, etc. The corresponding value is the product of the exponent factor 2**(EXP-1024) and the mantissa with the appropriate sign attached. Unit Vector: Uranus, x-component - Sign 46 1117 1117 UnsignedBitString The sixteenth quantity in the record is the x-component of the unit vector from the spacecraft to Uranus. This is the sign bit for that component; "0" indicates a positive sign; "1" indicates a negative sign. Unit Vector: Uranus, x-component - Exponent 47 1118 1128 UnsignedBitString The sixteenth quantity in the record is the x-component of the unit vector from the spacecraft to Uranus. These 11 bits contain the exponent for that component. The exponent is biased by 1024; after removing the bias, the result is used to create the factor 2**(EXP-1024). Unit Vector: Uranus, x-component - Mantissa 48 1129 1188 UnsignedBitString The sixteenth quantity in the record is the x-component of the unit vector from the spacecraft to Earth. These 60 bits contain the mantissa for that component. The first bit in the mantissa is the bit representing 2**-1, the second is the bit representing 2**-2, etc. The corresponding value is the product of the exponent factor 2**(EXP-1024) and the mantissa with the appropriate sign attached. Unit Vector: Uranus, y-component - Sign 49 1189 1189 UnsignedBitString The seventeenth quantity in the record is the y-component of the unit vector from the spacecraft to Uranus. This is the sign bit for that component; "0" indicates a positive sign; "1" indicates a negative sign. Unit Vector: Uranus, y-component - Exponent 50 1190 1200 UnsignedBitString The seventeenth quantity in the record is the y-component of the unit vector from the spacecraft to Uranus. These 11 bits contain the exponent for that component. The exponent is biased by 1024; after removing the bias, the result is used to create the factor 2**(EXP-1024). Unit Vector: Uranus, y-component - Mantissa 51 1201 1260 UnsignedBitString The seventeenth quantity in the record is the y-component of the unit vector from the spacecraft to Uranus. These 60 bits contain the mantissa for that component. The first bit in the mantissa is the bit representing 2**-1, the second is the bit representing 2**-2, etc. The corresponding value is the product of the exponent factor 2**(EXP-1024) and the mantissa with the appropriate sign attached. Unit Vector: Uranus, z-component - Sign 52 1261 1261 UnsignedBitString The eighteenth quantity in the record is the z-component of the unit vector from the spacecraft to Uranus. This is the sign bit for that component; "0" indicates a positive sign; "1" indicates a negative sign. Unit Vector: Uranus, z-component - Exponent 53 1262 1272 UnsignedBitString The eighteenth quantity in the record is the z-component of the unit vector from the spacecraft to Uranus. These 11 bits contain the exponent for that component. The exponent is biased by 1024; after removing the bias, the result is used to create the factor 2**(EXP-1024). Unit Vector: Uranus, z-component - Mantissa 54 1273 1332 UnsignedBitString The eighteenth quantity in the record is the z-component of the unit vector from the spacecraft to Uranus. These 60 bits contain the mantissa for that component. The first bit in the mantissa is the bit representing 2**-1, the second is the bit representing 2**-2, etc. The corresponding value is the product of the exponent factor 2**(EXP-1024) and the mantissa with the appropriate sign attached.