The Data for this project is listed first by ground station and then by number; the number indicates chronological order. The ground station name should be largely irrelevant. Note that the files are compressed using UNIX "compress" so to utilize one of them you will have to "uncompress" them. A complete description of the specific format for each data file is given here. This should also enable you to write your own software if you so desire.
boss0379.z uncompress boss0379.z To download data for orbits 0 to 400:
To download data for orbits 401 to 700:
To download data for orbits 701 to 1100:
To download data for orbits 1101 and upwards:
| Date of Last Rev | Revs | Resolution | Grating Step | Detector | Spectral Coverage (Å) |
| 2-28-79 | 0 - 66 | Off | -- | -- | -- |
| 3-01-79 | 66 - 74 | Low | 19 | Both | 553 - 1200 |
| 3-01-79 | 74 - 77 | Low | 23 | Both | 614 - 1261 |
| 3-01-79 | 77 - 80 | Off | -- | -- | -- |
| 3-01-79 | 80 - 81 | High | 23 | Unfilt | 614 - 1261 |
| 3-01-79 | 81 - 84 | Low | 23 | Both | 614 - 1261 |
| 3-03-79 | 84 - 106 | Off | -- | -- | -- |
| 3-15-79 | 106 - 285 | High | 2 | Unfilt | 293 - 940 |
| 3-20-79 | 285 - 364 | Low | 16 | Both | 508 - 1155 |
| 3-28-79 | 364 - 488 | High | 33 | Unfilt | 768 - 1415 |
| 4-04-79 | 488 - 590 | High | 16 | Unfilt | 508 - 1155 |
| 4-17-79 | 590 - 785 | High | 1 | Unfilt | 276 - 923 |
| 4-17-79 | 785 - 788 | Off | -- | -- | -- |
| 4-18-79 | 788 - 801 | High | 1 | Unfilt | 276 - 923 |
| 4-18-79 | 801 - 804 | Off | -- | -- | -- |
| 5-17-79 | 804 - 1224 | High | 1 | Unfilt | 276 - 923 |
| 5-23-79 | 1224 - 1313 | High | 16 | Unfilt | 508 - 1155 |
| 5-24-79 | 1313 - 1328 | HV 1 Failure and Trouble-shooting |
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| 5-30-79 | 1328 - 1416 | High | 13 | Filt | 503 - 1140 |
| 5-31-79 | 1416 - 1428 | Off | -- | -- | -- |
| 6-09-79 | 1428 - 1548 | High | 16 | Filt | 503 - 1140 |
| 6-09-79 | 1548 - 1549 | Off | -- | -- | -- |
| 7-03-79 | 1549 - 1919 | High | 16 | Filt | 503 - 1140 |
| 7-18-79 | 1919 - 2153 | Off | -- | -- | -- |
| 7-20-79 | 2153 - 2190 | SCF Operations |
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| 8-25-79 | 2190 - 2726 | High | 16 | Filt | 503 - 1140 |
| 9-04-79 | 2726 - 2878 | High | 19 | Filt | 548 - 1185 |
| 9-19-79 | 2878 - 3096 | Off | -- | -- | -- |
| 10-09-79 | 3096 - 3400 | High | 19 | Filt | 548 - 1185 |
| 12-06-79 | 3400 - 4269 | High | 10 | Filt | 418 - 1055 |
| 1-05-80 | 4269 - 4720 | High | 13 | Filt | 459 - 1096 |
| 1-05-80 | 4720 - 4720 | HV 1 Test, Still Failed |
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| 3-15-80 | 4720 - 5762 | High | 13 | Filt | 459 - 1096 |
| 3-15-80 | 5762 | Turned Off |
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After 7-04-79, ECOM was occasionally turned off without notification. Though the two long periods during which it was turned off are indicated on the log, there may be short off periods interspersed in the remainder.
Accuracy on the date of various events is plus or minus one day.
| Grating Step | Spectral Coverage (Å) | Revs = | Days = | Seconds |
| 1 | 276 - 923 | 628 | 41.9 | 3.6x10^6 |
| 2 | 293 - 940 | 179 | 11.9 | 1.0x10^6 |
| 16 | 508 - 1156 | 191 | 12.7 | 1.1x10^6 |
| 23 | 614 - 1261 | 1 | 0.1 | 6.0x10^3 |
| 33 | 768 - 1415 | 124 | 8.3 | 7.1x10^5 |
| Total Days = | 74.9 | |||
| Grating Step | Spectral Coverage (Å) | Revs = | Days = | Seconds |
| 10 | 418 - 1055 | 869 | 57.9 | 5.0x10^6 |
| 13 | 459 - 1069 | 1493 | 99.5 | 8.6x10^6 |
| 16 | 503 - 1140 | 1114 | 74.2 | 6.4x10^6 |
| 19 | 548 - 1185 | 456 | 30.4 | 2.6x10^6 |
| Total Days = | 262.0 | |||
After the undervoltages of July and August 1979, the duty cycle for data collection of P78-1 dropped drastically. Rough estimates are that 50% of daylight data and 20% of night data were collected after 9-1-79. Hence all observing times with the filtered detector (the only one in use after that date) should be multiplied by those approximate factors. Unfiltered and low resolution data were taken only during the period in which the spacecraft data duty cycle was 100%.
| Grating Step | Spectral Coverage (Å) | Revs = | Days = | Seconds |
| 16 | 508 - 1155 | 79 | 5.3 | 4.6x10^5 |
| 19 | 553 - 1200 | 8 | 0.5 | 4.0x10^4 |
| 23 | 614 - 1261 | 6 | 0.4 | 3.0x10^4 |
| Total Days = | 6.2 | |||
| Grating Step | Spectral Coverage (Å) | Revs = | Days = | Seconds |
| -- | -- | 617 | 41.1 | 3.6x10^6 |
| Total Days = | 41.1 | |||
Up through the official turn-off date of 3-15-80, ECOM-721 was in orbit for 384 days; it collected data on roughly 343 of those days. Up through roughly 9-1-79, the data collection duty cycle was 100%. That is, if ECOM was turned on, its data as being recorded and telemetered. After 9-1-79, the data collection duty cycle dropped drastically. Hence, after this date, the log is indicative of whether the instrument was turned on and in what configuration during some extended event. However, our current documentation is insufficient to determine whether the data was being recorded during a transient event.
This page contains a description and list of the data analysis software written in FORTRAN and IDL.
