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SSC Users Guide - Table of
Contents
Currently the SSCWeb carries three magnetic field models for the external currents, besides the lower altitude IGRFs:
| Model | Database s/c | Activity Levels | Tailward range of validity | Comments |
|---|---|---|---|---|
| T87Wd | IMPs,HEOSs,ISEEs | 6 Kp | 70 RE | Warped neutral sheet |
| T89c | IMPs,HEOSs,ISEEs | 7 Kp | 70 RE | Revised T89, with more data |
| T96 | IMPs,HEOSs,ISEEs | 7 Kp | 70 RE | Bz, By, Dst |
The original datasets are almost identical in all three above models. The data were gathered from several s/c as listed below.
| Spacecraft | Time Interval Used | No. Points | Total Time,hours | No. Orbits |
|---|---|---|---|---|
| A-IMP D(Explorer 33) | July ‘66 - July ‘68 | 724 | 356 | 34 |
| A-IMP E(Explorer 35) | July ‘67 - Jan ‘69 | 1,260 | 1,260 | 17 |
| IMP 4(IMP F, Explorer 34) | May ‘67 - Sept ‘71 | 5,173 | 2,799 | 144 |
| IMP 5\ (IMP G,Explorer 41) | June ‘69 -Sept ‘71 | 9,426 | 5,480 | 195 |
| IMP 6\ IMP I,Explorer 43 | Mar ‘71 - Sept ‘74 | 11,801 | 5,419 | 312 |
| HEOS 1 | Dec ‘68 - Dec ‘73 | 3,908 | 1,980 | 215 |
| HEOS 2 | Feb ‘72 - Aug ‘74 | 3,044 | 1,320 | 152 |
| IMP 7\ IMP H,Explorer 47 | Sept ‘72 - Apr ‘73 | 681 | 650 | 14 |
| IMP 8\ IMP J,Explorer 50 | Oct ‘73 - June ‘86 | 9,568 | 8,052 | 280 |
| ISEE 1 | Jan ‘80 - Dec ‘81 | 17,602 | 6,794 | 301 |
| ISEE 2 | Jan ‘78 - Jan ‘80 | 16,558 | 6,497 | 311 |
| Totals | 79,745 | 40,607 |
For additional information about these data sets please refer to “A large magnetosphere magnetic field database,” Fairfield et al. JGR, 99, 11319, 1994.
