Fundamental TechnologiesVoyager LECP Pages |
Record and File Structure: Near Encounter
(applies to Voyager 1 Jupiter, 1979 day 64, and Voyager 2 Saturn, 1981 day 238)
Table 1. File Names
Character # | Meaning |
1 | V for Voyager |
2 | 1 or 2 for Voyager 1 or Voyager 2 |
3 and 4 | Last 2 digits of Year of File Beginning (77 = 1977) |
5, 6, and 7 | Day of Year for File Beginning (1 = January 1) |
8 | A,B,C, D,E, F, G, or H for File Beginning Time of SCET Hour 0,3,6,9,12,15,18,21, respectively. |
9 and 10 | NG identifying this file as LECP Near Encounter Mode |
11 and 12 | 01 through 09 identifying which Near Encounter Rate Group is present (see table 3 below) |
13, 14, 15, and 16 | .CSV Identifying this file as Comma Separated Variable ASCII form with the first record containing column labels and all subsequent records to end of file having items as described in Table 2 below. Note that missing data is denoted in two ways-successive commas with no intervening space in the counts field denotes missing data. The corresponding T_acc. Field will show 0 |
Table 2. Record Field by Field Description
Column Number | Contents Name | Units |
1 | Year | Year of Data Item Beginning |
2 | Day | Day of Data Item Beginning (DOY 1=January 1) |
3 | Hour | Hour of Data Item Beginning |
4 | Minute | Minute of Data Item Beginning |
5 | Second | Second of Data Item Beginning |
6 | STEP | LECP Stepping Platform Position (0-7) |
7 | MOV. | Motor Movement Flag (0=no movement, 1 = movement during accumulation) |
8 | Counts in Channel | Counts per accumulation |
9 | T_acc. | Accumulation time in second of above channel |
10, 11, | Repeat for additional channels (see Table 3) |
Table 3. Annotation of Field Contents
File # | Column # |
|||||||
1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | |
1 | PL01 | PL02 | PL03 | EB04 | EBP04 | |||
2 | EB01 | EBP01 | EB02 | EBP02 | EB03 | EBP03 | EG06 | |
3 | PD09 | DP09 | PD10 | DP10 | PD11 | DP11 | AD03 | DA03 |
4 | EG07 | EG08 | EG09 | EB05 | EBP05 | |||
5 | PSA3 | PSB3 | PAB12 | PAB13 | ||||
6 | PL04 | ZD01 | DZ01 | ESA0 | ESB0 | |||
7 | PSA1 | PSB1 | PSA2 | PSB2 | ||||
8 | AL01 | AL02 | PL08 | AD04 | DA04 | |||
9 | EAB10 | PL05 | PL06 | PL07 |
Note: Passbands and Geometrical Factors corresponding to each of the labels are given in Tables 4 and 5 for Voyager 1 and 2 respectively.
Table 4. Near Encounter Channel Definitions for Voyager 1 LECP
Table 5. Near Encounter Channel Definitions for Voyager 2 LECP
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Last modified 7/7/05, Tizby Hunt-Ward
tizby@ftecs.com