IMP-8 Solar Wind Data Detailed Description of Data Columns

Please acknowledge the original investigators and the NSSDC, who kindly provided these data, in any publication resulting from their use. For further information about imp8 and its payload, see Joe King, Availablity of IMP-8 Data for IMS Period, in IMS Source Book (edited by C. T. Russell and D. J. Southwood), pp.10-20, American Geophysical Union, Washington, DC, 1982.
Col#| Name           | Unit   | Description                                                        |
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2   | BX GSM         | nT     | Columns 2-4 are magnetic field components in GSM and column 5      |
3   | BY GSM         | nT     | is the magnetic field strength. They are 5 min averages from       |
4   | BZ GSM         | nT     | higher resolution data (15 sec before Dec 31, 1990 and 1 min       |
5   | BT             | nT     | after Jan 1, 1991) made by UCLA. These data are also available     |
    |                |        | through NSSDC. The original PI of this investigation was N.F. Ness.|
    |                |        | For questions about the instrument or the original measurements,   |
    |                |        | please contact the present PI R. P. Lepping (email:                |
    |                |        | u5rpl@lepvax.gsfc.nasa.gov). Data in the magnetosheath and         |
    |                |        | magnetotail are also included in this file.                        |
----+----------------+--------+--------------------------------------------------------------------+
6   | X GSM          | RE     | IMP-8 positions in GSM                                             |
7   | Y GSM          | RE     |                                                                    | 
8   | Z GSM          | RE     |                                                                    |
----+----------------+--------+--------------------------------------------------------------------+
9   | BY GSE         | nT     | Magnetic field components in GSE.  (BX GSE = BX GSM)               |
10  | BZ GSE         | nT     |                                                                    |
----+----------------+--------+--------------------------------------------------------------------+
11  | Y GSE          | RE     | IMP-8 positions in GSE. (X GSE = X GSM)                            |
12  | Z GSE          | RE     |                                                                    |
----+----------------+--------+--------------------------------------------------------------------+
    |                |        | The source of columns 13-19 is Los Alamos National Lab (LANL)      |
    |                |        | Plasma Instrument: Electrostatic Analyzer. The PI of the           |
    |                |        | instrument was S. J. Bame. For questions about the instrument or   |
    |                |        | the original data, please contact the current PI J. T. Gosling:    |
    |                |        | Email: gosling@sstcx1.lanl.gov.  Only solar wind portion of the    |
    |                |        | data are included in this data set.                                |
13  |Np (LANL)       | N/CM^3 | - Number density of proton                                         |
14  |Vp (LANL)       | KM/SEC | - Proton bulk velocity                                             |
15  |AZIMUTH  (LANL) | DEGREE | - The azimuthal angle of proton bulk velocity                      |
16  |Tpar(MAX) (LANL)| K      | - Parallel proton temperature                                      |
17  |Tper(MIN) (LANL)| K      | - Perpendicular proton temperature                                 |
18  |ALFRAC          |        | - The ratio of alpha current to proton peak current.               | 
19  |DP (LANL)       | nPa    | - Dynamic Pressure calculated from the proton density and velocity:|
    |                |        |   DP (nPa) = 1.6726E-6*Np(1/cc)*Vp^2(km^2/sec^2).                  |
    |                |        |   It does not include the contribution of alpha particles.         |
    |                |        |                                                                    |
----+----------------+--------+--------------------------------------------------------------------+
    |                |        | The source of columns 20-26 is MIT Plasma Instrument: Faraday Cup. |
    |                |        | The original PI of the instrument was H. Bridge.  The current PI   | 
    |                |        | of the instrument is A. J. Lazarus. Please contact him for         |
    |                |        | questions about the data (Email: ajl@space.mit.edu). Some          |
    |                |        | magnetosheath data are included in this file.                      |
20  |Np (MIT)        | N/CM^3 | - Number density of proton                                         |
21  |Vp (MIT)        | KM/SEC | - Proton bulk velocity                                             |
22  |AZIMUTH (MIT)   | DEGREE | - The azimuthal angle of proton bulk velocity                      |
23  |LAT (MIT)       | DEGREE | - The latitude angle of proton bulk velocity                       |
24  |Temp            | K      | - Proton temperature that is equal to 60.5*(Thermal Speed)^2       |
25  |ALFRAC (MIT)    | IMP-8  | - The ratio of alpha current to proton peak current                |
26  |DP (MIT)        | nPa    | - Same as column 19 but from MIT instrument                        |
----+----------------+ -------+--------------------------------------------------------------------+
    |                |        | Columns 27 and 28 are corrected proton densities after performing  |
    |                |        | IMP-8 and ISEE 3 intercalibrations by Petrinec and Russell         |
    |                |        | [cf. Petrinec and Russell, JGR, 98, 18,971, 1993].                 |
27  |Npcorr (MIT)    | #/CC   | - corrected MIT proton density                                     |
28  |Npcorr (LANL)   | #/CC   | - corrected LANL proton density                                    |
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