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Fundamental TechnologiesVoyager LECP Pages |
Description of Hourly and Hourlyf CSV Files
Introduction
HOURLY and HOURLYF CSV files are prepared from the SCN binary files. The SCN software builds records that include data from all of the sectors of an LECP scan. Data for which the motor position is unknown are placed in the “Sector 9” (also array index 9) position. Sector 10 contains the best estimate of the average values for a scan. The stepping motor takes the instrument through the sequence 1,2,3,4,5,6,7,8,8,7,6,5,4,3,2,1 (full scan) or 2,3,4,5,6,7,8,8,7,6,5,4,3,2 (limited scan), and in some circumstances, parked. When the LECP instrument was parked, the scan software writes out records at reasonable time intervals where only the index corresponding to the parked position contains data. The HOURLYF files are prepared from severely filtered FAT files. Noisy HOURLY data can be compared to HOURLYF data on a record by record basis to identify spurious numbers. HOURLY data may also be compared to STEP data for validation.
Naming Conventions for HOURLY and HOURLYF CSV Files
The syntax is:
VSYYDDDFHCC.CSV where:
S = 1 or 2 (identifying Voyager 1 or Voyager 2 data, respectively)
YY = two digit year number (77 through ??)
DDD = three digit day of year (for file start time)
“F” Denotes that the data are filtered (this character is not present for unfiltered data)
“H” Denotes ASCII HOURLY Listing
CC = Channel number from the table below.
Passbands and Geometrical Factors for
Voyager 1 LECP Far Encounter and Cruise Channels
Passbands and Geometrical Factors for
Voyager 2 LECP Far Encounter and Cruise Channels
Description of Voyager LECP CSV Files Type "H," or "HOURLY," also "FH" or "HOURLYF"
| Record # | Field # |
Contents | |
| 1 | 1 |
Spacecraft ID VOYAGER:1:PRINTED (example) | |
2 |
ON: | ||
3 |
Date& Binary Source 4-SEP-01:16:42:34:V177250S03 (example) | ||
| 2 | 1 |
YY |
Labeling for Start Time of Data Interval |
2 |
DAY | ||
3 |
HH | ||
4 |
MM | ||
5 |
SS | ||
6 |
YY |
Labeling for End Time of Data Interval | |
7 |
DAY | ||
8 |
HH | ||
9 |
MM | ||
10 |
SS | ||
11 |
dd | Label for Scan Direction of this Sector | |
12 |
Label for Channel, Sector #1 Eβ01RATE | ||
13 |
Label for Channel, Sector #1 Uncertainty Eβ01UNC | ||
14 |
Label for Channel, Sector #2 | ||
15 |
Label for Channel, Sector #2 Uncertainty | ||
16 |
Label for Channel, Sector #3 | ||
17 |
Label for Channel, Sector #3 Uncertainty | ||
18 |
Label for Channel, Sector #4 | ||
19 |
Label for Channel, Sector #4 Uncertainty | ||
20 |
Label for Channel, Sector #5 | ||
21 |
Label for Channel, Sector #5 Uncertainty | ||
22 |
Label for Channel, Sector #6 | ||
23 |
Label for Channel, Sector #6 Uncertainty | ||
24 |
Label for Channel, Sector #7 | ||
25 |
Label for Channel, Sector #7 Uncertainty | ||
26 |
Label for Channel, Sector #8 | ||
27 |
Label for Channel, Sector #8 Uncertainty | ||
28 |
Label for Channel, Sector #9 | ||
29 |
Label for Channel, Sector #9 Uncertainty | ||
30 |
Label for Channel, Sector #10 | ||
31 |
Label for Channel, Sector #10 Uncertainty | ||
| 3 | 1 |
Data Start Time Year |
|
2 |
Data Start Time Day | ||
3 |
Data Start Time Hour | ||
4 |
Data Start Time Minute | ||
5 |
Data Start Time Second | ||
6 |
Data End Time Year | ||
7 |
Data End Time Day | ||
8 |
Data End Time Hour | ||
9 |
Data End Time Minute | ||
10 |
Data End Time Second |
||
11 |
Direction +1 for increasing, -1 for decreasing, 0 if unknown | ||
12 |
Sector 1 Rate of Channel Eβ01RS01 (counts/second, -1 if not present) | ||
13 |
Uncertainty of Above (counts/second, -1 if not present) | ||
14 |
Sector 2 Rate of Channel Eβ01RS02 (counts/second, -1 if not present) | ||
15 |
Uncertainty of Above (counts/second, -1 if not present) | ||
16 |
Sector 3 Rate of Channel Eβ01RS03 (counts/second, -1 if not present) | ||
17 |
Uncertainty of Above (counts/second, -1 if not present) | ||
18 |
Sector 4 Rate of Channel Eβ01RS04 (counts/second, -1 if not present) | ||
19 |
Uncertainty of Above (counts/second, -1 if not present) | ||
20 |
Sector 5 Rate of Channel Eβ01RS05 (counts/second, -1 if not present) | ||
21 |
Uncertainty of Above (counts/second, -1 if not present) | ||
22 |
Sector 6 Rate of Channel Eβ01RS06 (counts/second, -1 if not present) | ||
23 |
Uncertainty of Above (counts/second, -1 if not present) | ||
24 |
Sector 7 Rate of Channel Eβ01RS07 (counts/second, -1 if not present) | ||
25 |
Uncertainty of Above (counts/second, -1 if not present) | ||
26 |
Sector 8 Rate of Channel Eβ01RS08 (counts/second, -1 if not present) | ||
27 |
Uncertainty of Above (counts/second, -1 if not present) | ||
28 |
Sector 9 Rate of Channel Eβ01RS09 (counts/second, -1 if not present) | ||
29 |
Uncertainty of Above (counts/second, -1 if not present) | ||
30 |
Sector 10 Rate of Channel Eβ01RS010 (counts/second, -1 if not present) | ||
31 |
Uncertainty of Above (counts/second, -1 if not present) | ||
Return to Voyager LECP Data Analysis Handbook Table of
Contents.
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Last modified 8/5/05, Tizby Hunt-Ward
tizby@ftecs.com