Document title: Format description for NDADS PIONEER P11_HVM_IP_15M_ASCII datatype Project: PIONEER NDADS Datatype: P11_HVM_IP_15M_ASCII Super-EID: DOCUMENT There may be other documents also identified by this super-EID. NDADS filename: FORMAT_HVM_IP_P11_15M.TXT TRF entry: b46628.txt in NSSDC's controlled digital document library, Feb. 1998. Document text follows: ---------------------- CCSD3FF0000500000001CCSD3CS00004MRK**001 ADIDNAME=NSSD0122; CCSD$$MARKERMRK**001CCSD3KS00002MRK**002 Subm_Name: Joyce Wolf Subm_Addr: Mail Stop 169-506 Jet Propulsion Laboratory 4800 Oak Grove Drive Pasadena, CA 91109 Telephone: 818-354-7361 Electronic Mail (SPAN): JPLSP::JWOLF Subm_Date: 1992-05-03 Title: Format for Pioneer 11 HVM Cruise Data Archive Descr: Format description of the Pioneer 11 Helium Vector Magnetometer cruise phase archive data set, April 1973 through March 1992. Rel_Date: 1992-06-01 CCSD$$MARKERMRK**002CCSD3DF0000200000001 File_Class_Name: HVM_AVG_FILE Record_Type_Names: HVM_AVG_REC File_Class_Syntax: All records in the Pioneer 10 and 11 HVM cruise phase data archive are of the same type, size, and format. Record_Name: HVM_AVG_REC Record_Structure: Fixed length records; no record terminators. Record_Length: 372 bytes (each byte is one ASCII character) Record_Field_Names: STARTAV, COORDSYS, LENGTHAV, TOTDATA, SCETFIRST, SCETLAST, GRTFIRST, GRTLAST, BX, BY, BZ, BX2, BXBY, BXBZ, BY2, BYBZ, BZ2, BXCOS, BYCOS, BZCOS, BMAG, BMAG2, HRANGP, CELLTP, CELLNP, REARSU, CELLTE, CELLNE, BLANK Record_Syntax: There are 29 fields in each record. SCET indicates Spacecraft Event Time; GRT indicates Ground Received Time. If no data exists for a particular averaging interval, TOTDATA = 0, and fields 5 through 22 are also set to zero. FIELD NAME FORMAT BRIEF DESCRIPTION 1 STARTAV A16 SCET start of averaging interval (Time Code A) 2 COORDSYS 1X,A2 Coordinate System Identifier 3 LENGTHAV 1X,I5 Length of averaging interval in seconds 4 TOTDATA 1X,F9.3 Total seconds of data included in this interval 5 SCETFIRST 1X,F9.3 SCET of first data in this interval (sec of day) 6 SCETLAST 1X,F9.3 SCET of last data in this interval (sec of day) 7 GRTFIRST 1X,F7.0 GRT of first data in this interval (sec of day) 8 GRTLAST 1X,F7.0 GRT of last data in this interval (sec of day) 9 BX 1X,E14.6 Average of X component of field 10 BY 1X,E14.6 Average of Y component of field 11 BZ 1X,E14.6 Average of Z component of field 12 BX2 1X,E14.6 Average of square of X component 13 BXBY 1X,E14.6 Average of product of X and Y components 14 BXBZ 1X,E14.6 Average of product of X and Z components 15 BY2 1X,E14.6 Average of square of Y component 16 BYBZ 1X,E14.6 Average of product of Y and Z components 17 BZ2 1X,E14.6 Average of square of Z component 18 BXCOS 1X,E14.6 Average of X direction cosine of field 19 BYCOS 1X,E14.6 Average of Y direction cosine of field 20 BZCOS 1X,E14.6 Average of Z direction cosine of field 21 BMAG 1X,E14.6 Average of field magnitude 22 BMAG2 1X,E14.6 Average of square of field magnitude 23 HRANGP 1X,E14.6 Distance of spacecraft from Sun 24 CELLTP 1X,E14.6 Heliocentric celestial latitude of spacecraft 25 CELLNP 1X,E14.6 Heliocentric celestial longitude of spacecraft 26 REARSU 1X,E14.6 Distance of Earth from Sun 27 CELLTE 1X,E14.6 Heliocentric celestial latitude of Earth 28 CELLNE 1X,E14.6 Heliocentric celestial longitude of Earth 29 BLANK 1X One blank Field_Name: SCET Start of averaging interval Field_Mnemonic: STARTAV Field_Units: ASCII Timecode A (YYYY-MM-DDThh:mm in UTC) Field_Resolution: 1 Minute Field_Range: 1973-04-06T00:00 to 1993-08-02T23:59 Field_Description: Spacecraft event time of start of averaging interval. The subfield YYYY is the four digit year, MM is the month (01 to 12), DD is the day of month (01 to 31), hh represents hours (00 to 23), and mm represents minutes (00 to 59). For hour averages, the minutes subfield will always be '00', and for 15-minute averages, it will be '00' or '15' or '30' or '45'. Field_Representation: 16 ASCII characters (I4,'-',I2,'-',I2,'T',I2,':',I2) Field_Name: Coordinate System Identifier Field_Mnemonic: COORDSYS Field_Units: Not applicable Field_Range: Value is ' SH' or ' SJ' or ' PE' Field_Description: Coordinate System identifier for the field vector components. The SH system has its X axis in the Sun-to-Pioneer direction; Y is the unit vector in the direction of the cross-product H x X, where H is the Sun's rotation axis; Z = X x Y. Referred to the mean equinox and ecliptic of date, the components of H are 0.126199 COS(A), 0.126199 SIN(A), 0.992005, where A = -14.6304 + .0139583(t-1972.0) deg, t = year. The SJ system has its X axis in the Pioneer-to-Sun direction; Y is the unit vector in the direction J x X, where J is Jupiter's rotation axis; and Z = X x Y. J = (-0.01448, -0.03482, 0.99929), referred to mean equinox and ecliptic of 1974.0. The PE system has its Z axis along Pioneer's spin axis, which nominally points toward the Earth; its X axis is the unit vector in the direction E x Z, where E is the north perpendicular to the Ecliptic; and Y = Z x X. Field_Representation: 3 ASCII characters (1X,A2) Field_Name: Length of averaging interval in seconds Field_Mnemonic: LENGTHAV Field_Units: Seconds Field_Resolution: 1 second Field_Range: Always equal to 3600 for hour averages, 900 for 15-minute averages. Field_Description: Number of seconds in averaging interval. Field_Representation: 6 ASCII characters (1X,I5) Field_Name: Total seconds of data included in this interval Field_Mnemonic: TOTDATA Field_Units: Seconds Field_Resolution: .001 sec. Field_Range: 0 to 3612 for hour averages; 0 through 960 for 15-minute averages. Field_Description: This value is the sum of the sample time for each high resolution data point included in the averages. The sampling time varied with bit rate; at the highest bit rate of 2048 bps, the time between successive points was 3/32 sec; at the lowest rate of 16 bps, it is 12 sec. (Bit rates typically changed several times during a day.) A value of zero means that there was no data at all during the averaging interval. The value of TOTDATA should be used as a weighting factor when using a number of these averages to compute averages over a longer time interval. Field_Representation: 10 ASCII characters (1X,F9.3) Field_Name: SCET of first data for this interval (sec of day) Field_Mnemonic: SCETFIRST Field_Units: Seconds from start of day Field_Resolution: .001 sec. Field_Range: 0 to 86400 Field_Description: Spacecraft event time of the midpoint of the first GRT (Ground Received Time) 1-minute interval with data that is included in this averaging interval, measured in seconds from start of day specified in STARTAV. Field_Representation: 10 ASCII characters (1X,F9.3) Field_Name: SCET of last data for this interval (sec of day) Field_Mnemonic: SCETLAST Field_Units: Seconds from start of day Field_Resolution: .001 sec. Field_Range: 0 to 86400 Field_Description: Spacecraft event time of the midpoint of the last GRT (Ground Received Time) 1-minute interval with data that is included in this averaging interval, measured in seconds from start of day specified in STARTAV. Field_Representation: 10 ASCII characters (1X,F9.3) Field_Name: GRT of first data for this interval (sec of day) Field_Mnemonic: GRTFIRST Field_Units: Seconds from start of day Field_Resolution: 1 sec. Field_Range: 0 through 108000 Field_Description: Ground Received time of the midpoint of the first 1-minute interval with data that is included in this averaging interval, measured in seconds from start of day specified in STARTAV. Field range allows for up to 6 hours one-way light time. Field_Representation: 8 ASCII characters (1X,F7.0) Field_Name: GRT of last data for this interval (sec of day) Field_Mnemonic: GRTLAST Field_Units: Seconds from start of day Field_Resolution: 1 sec. Field_Range: 0 through 108000 Field_Description: Ground Received time of the midpoint of the last 1-minute interval with data that is included in this averaging interval, measured in seconds from start of day specified in STARTAV. Field range allows for up to 6 hours one-way light time. Field_Representation: 8 ASCII characters (1X,F7.0) Field_Name: Average of X component of field Field_Mnemonic: BX Field_Units: Nanotesla Field_Range: -1.4E5 to 1.4E5 (instrument limits) Field_Description: Average of X Component of magnetic field vector Field_Representation: 15 ASCII characters (1X,E14.6) Field_Name: Average of Y component of field Field_Mnemonic: BY Field_Units: Nanotesla Field_Range: -1.4E5 to 1.4E5 (instrument limits) Field_Description: Average of Y Component of magnetic field vector Field_Representation: 15 ASCII characters (1X,E14.6) Field_Name: Average of Z component of field Field_Mnemonic: BZ Field_Units: Nanotesla Field_Range: -1.4E5 to 1.4E5 (instrument limits) Field_Description: Average of Z Component of magnetic field vector Field_Representation: 15 ASCII characters (1X,E14.6) Field_Name: Average of square of X component Field_Mnemonic: BX2 Field_Units: Nanotesla squared Field_Range: 0 to 1.9E10 (instrument limits) Field_Description: Average of square of X component of magnetic field vector. Field_Representation: 15 ASCII characters (1X,E14.6) Field_Name: Average of product of X and Y components Field_Mnemonic: BXBY Field_Units: Nanotesla squared Field_Range: -1.9E10 to 1.9E10 (instrument limits) Field_Description: Average of product of X and Y components of magnetic field vector. Field_Representation: 15 ASCII characters (1X,E14.6) Field_Name: Average of product of X and Z components Field_Mnemonic: BXBZ Field_Units: Nanotesla squared Field_Range: -1.9E10 to 1.9E10 (instrument limits) Field_Description: Average of product of X and Z components of magnetic field vector. Field_Representation: 15 ASCII characters (1X,E14.6) Field_Name: Average of square of Y component Field_Mnemonic: BY2 Field_Units: Nanotesla squared Field_Range: 0 to 1.9E10 (instrument limits) Field_Description: Average of square of Y component of magnetic field vector Field_Representation: 15 ASCII characters (1X,E14.6) Field_Name: Average of product of Y and Z components Field_Mnemonic: BYBZ Field_Units: Nanotesla squared Field_Range: 0 to 1.9E10 (instrument limits) Field_Description: Average of product of Y and Z components of magnetic field vector Field_Representation: 15 ASCII characters (1X,E14.6) Field_Name: Average of square of Z component Field_Mnemonic: BZ2 Field_Units: Nanotesla squared Field_Range: -1.9E10 to 1.9E10 (instrument limits) Field_Description: Average of square of Z component of magnetic field vector Field_Representation: 15 ASCII characters (1X,E14.6) Field_Name: Average of X direction cosine of field Field_Mnemonic: BXCOS Field_Units: Unitless number Field_Range: -1 to +1 Field_Description: Average of the quotient of the X component divided by the magnitude of the magnetic field vector Field_Representation: 15 ASCII characters (1X,E14.6) Field_Name: Average of Y direction cosine of field Field_Mnemonic: BYCOS Field_Units: Unitless number Field_Range: -1 to +1 Field_Description: Average of the quotient of the Y component divided by the magnitude of the magnetic field vector Field_Representation: 15 ASCII characters (1X,E14.6) Field_Name: Average of Z direction cosine of field Field_Mnemonic: BZCOS Field_Units: Unitless number Field_Range: -1 to +1 Field_Description: Average of the quotient of the Z component divided by the magnitude of the magnetic field vector Field_Representation: 15 ASCII characters (1X,E14.6) Field_Name: Average of field magnitude Field_Mnemonic: BMAG Field_Units: Nanotesla Field_Range: 0 to 2.4E5 (instrument limits) Field_Description: Average of the magnitude of the magnetic field vector Field_Representation: 15 ASCII characters (1X,E14.6) Field_Name: Average of square of field magnitude Field_Mnemonic: BMAG2 Field_Units: Nanotesla squared Field_Range: 0 to 5.8E10 (instrument limits) Field_Description: Average of the square of the magnitude of the magnetic field vector Field_Representation: 15 ASCII characters (1X,E14.6) Field_Name: Distance of spacecraft from Sun Field_Mnemonic: HRANGP Field_Units: Kilometers Field_Range: 1.E8 to 1.E10 Field_Description: Distance of the spacecraft from the Sun at the start of the averaging interval Field_Representation: 15 ASCII characters (1X,E14.6) Field_Name: Heliocentric celestial latitude of the spacecraft Field_Mnemonic: CELLTP Field_Units: Degrees Field_Range: -90 to 90 Field_Description: Heliocentric latitude of the spacecraft at the start of the averaging interval, referred to Ecliptic of date Field_Representation: 15 ASCII characters (1X,E14.6) Field_Name: Heliocentric celestial longitude of the spacecraft Field_Mnemonic: CELLNP Field_Units: Degrees Field_Range: 0 to 360 Field_Description: Heliocentric longitude of the spacecraft at the start of the averaging interval, referred to Ecliptic and Equinox of date Field_Representation: 15 ASCII characters (1X,E14.6) Field_Name: Distance of Earth from Sun Field_Mnemonic: REARSU Field_Units: Kilometers Field_Range: 1.4E8 to 1.6E8 Field_Description: Distance of Earth from the Sun at the start of the averaging interval Field_Representation: 15 ASCII characters (1X,E14.6) Field_Name: Heliocentric celestial latitude of Earth Field_Mnemonic: CELLTE Field_Units: Degrees Field_Range: -90 to 90 Field_Description: Heliocentric latitude of Earth at the start of the averaging interval, referred to Ecliptic of date Field_Representation: 15 ASCII characters (1X,E14.6) Field_Name: Heliocentric celestial longitude of Earth Field_Mnemonic: CELLNE Field_Units: Degrees Field_Range: 0 to 360 Field_Description: Heliocentric longitude of Earth at the start of the averaging interval, referred to Ecliptic and Equinox of date Field_Representation: 15 ASCII characters (1X,E14.6) Field_Name: One blank Field_Mnemonic: BLANK Field_Units: Not applicable Field_Range: Always blank Field_Description: One ASCII blank character Field_Representation: 1 ASCII character (1X)