The Ulysses spacecraft was occulted by the Io Plasma Torus (IPT) during its Jupiter encounter on 8 February 1992. The Ulysses radio subsystem was utilized to measure the columnar electron density of the IPT on this occasion [Bird et al., 1992; 1993]. These data, together with all Ulysses results from the Jupiter encounter, are archived at the Planetary Data System (PDS).
The following table gives an idea about the size and coverage of the Ranging data set from the solar conjunctions C1 and C4:
| Stage# | start | stop | ascii size | gzip size |
|---|---|---|---|---|
| mo:dd:hh:mm | mo:dd:hh:mm | (kB) | (kB) | |
| 1 | 08:06:22:28 | 09:05:22:35 | 323 | 51 |
| 2 | 08:07:01:11 | 09:05:17:55 | 231 | 40 |
| 3 | 08:07:01:11 | 09:05:17:55 | 88 | 20 |
All stage #3 ranging data during the Ulysses solar conjunction C1 from 7 August to 5 September 1991 have been provided to the NSSDC archive, the first few lines of which are as follows:
| year mo dd hh:mm:ss | set | no | dss | difrng | econt |
|---|---|---|---|---|---|
| 1991- 8- 7T 1:11:23.712Z | 1 | 1 | 43 | 557 | 2227 |
| 1991- 8- 7T 1:21:24.192Z | 1 | 2 | 43 | 555 | 2219 |
| 1991- 8- 7T 1:31:24.672Z | 1 | 3 | 43 | 567 | 2267 |
| 1991- 8- 7T 1:41:24.288Z | 1 | 4 | 43 | 575 | 2299 |
| 1991- 8- 7T 1:51:23.904Z | 1 | 5 | 43 | 578 | 2311 |
| 1991- 8- 7T 2: 1:23.520Z | 1 | 6 | 43 | 574 | 2295 |
| 1991- 8- 7T 2:11:24.000Z | 1 | 7 | 43 | 567 | 2267 |
| 1991- 8- 7T 2:21:23.616Z | 1 | 8 | 43 | 575 | 2299 |
| 1991- 8- 7T 2:31:23.232Z | 1 | 9 | 43 | 584 | 2335 |
| 1991- 8- 7T 2:41:23.712Z | 1 | 10 | 43 | 570 | 2279 |
| 1991- 8- 7T 2:51:24.192Z | 1 | 11 | 43 | 572 | 2287 |
| 1991- 8- 7T 3: 1:24.672Z | 1 | 12 | 43 | 582 | 2327 |
| 1991- 8- 7T 3:11:24.288Z | 1 | 13 | 43 | 591 | 2363 |
| 1991- 8- 7T 3:31:23.520Z | 1 | 14 | 43 | 596 | 2383 |
| 1991- 8- 7T 3:41:24.000Z | 1 | 15 | 43 | 588 | 2351 |
| Stage# | start | stop | ascii size | gzip size |
|---|---|---|---|---|
| mo:dd:hh:mm | mo:dd:hh:mm | (kB) | (kB) | |
| 1 | 02:22:20:01 | 03:14:14:07 | 480 | 75 |
| 2 | 02:23:05:01 | 03:14:14:06 | 398 | 63 |
| 3 | 02:23:05:06 | 03:14:14:06 | 145 | 33 |
All stage #3 ranging data during the Ulysses solar conjunction C4 from 7 August to 5 September 1991 have been provided to the NSSDC archive, the first few lines of which are as follows:
| year mo dd hh:mm:ss | set | no | dss | difrng | econt |
|---|---|---|---|---|---|
| 1995- 2-23T 5: 6:29.376Z | 1 | 1 | 42 | 378 | 1512 |
| 1995- 2-23T 5:11:55.104Z | 1 | 2 | 42 | 385 | 1540 |
| 1995- 2-23T 5:17:20.832Z | 1 | 3 | 42 | 376 | 1504 |
| 1995- 2-23T 5:22:47.424Z | 1 | 4 | 42 | 427 | 1708 |
| 1995- 2-23T 5:28:13.152Z | 1 | 5 | 42 | 400 | 1600 |
| 1995- 2-23T 5:33:38.880Z | 1 | 6 | 42 | 382 | 1528 |
| 1995- 2-23T 5:39: 4.608Z | 1 | 7 | 42 | 392 | 1568 |
| 1995- 2-23T 5:44:31.200Z | 1 | 8 | 42 | 416 | 1664 |
| 1995- 2-23T 5:49:56.928Z | 1 | 9 | 42 | 384 | 1536 |
| 1995- 2-23T 5:55:22.656Z | 1 | 10 | 42 | 391 | 1564 |
| 1995- 2-23T 6: 0:49.248Z | 1 | 11 | 42 | 400 | 1600 |
| 1995- 2-23T 6: 6:14.976Z | 1 | 12 | 42 | 406 | 1624 |
| 1995- 2-23T 6:11:40.704Z | 1 | 13 | 42 | 411 | 1644 |
| 1995- 2-23T 6:17: 7.296Z | 1 | 14 | 42 | 399 | 1596 |
| 1995- 2-23T 6:22:33.024Z | 1 | 15 | 42 | 419 | 1676 |
where:
| year | = 1991 or 1995 |
|---|---|
| mo | = month of year |
| dd | = day of month |
| hh:mm:ss | = hours, minutes seconds (UT, ground received) |
| set | = running no. for each DSN tracking pass during C1/C4 |
| no | = running no. for range measurement within each tracking pass |
| dss | = DSN station number |
| difrng | = differential range delay in `range units' (RU) [DSN 810-5] |
| econt | = electron content in `hexems' [Bird et al., 1992a; 1994] |
| difrng (RU) and econt (hexems) are given to the nearest respective unit. The estimated accuracy of a differential range measurement is of the order of 50 range units. |
The following table gives an idea about the size and coverage of the Ranging data set from the Jupiter encounter:
| Stage# | start | stop | ascii size | gzip size |
|---|---|---|---|---|
| doy:hh:mm | doy:hh:mm | (kB) | (kB) | |
| 1 | 36:15:54 | 41:14:44 | 116 | 17 |
| 2 | 36:20:30 | 40:18:44 | 88 | 13 |
| 3 | 36:21:44 | 40:18:44 | 22 | 4 |
All stage #3 ranging data from the Ulysses Jupiter encounter have been provided to the PDS archive. No ranging data were taken during the Jupiter encounter pass at DSS 43 on February 8, 1992. Here are the first few lines of the ascii table:
| set | no | dss | doy:hh:mm:ss | difrng | econt |
|---|---|---|---|---|---|
| 1 | 1 | 61 | 36:21:44:24 | 6 | 22 |
| 1 | 2 | 61 | 36:21:54:24 | 53 | 210 |
| 1 | 3 | 61 | 36:22: 4:24 | 16 | 62 |
| 1 | 4 | 61 | 36:22:14:25 | 38 | 150 |
| 1 | 5 | 61 | 36:22:44:24 | 67 | 266 |
| 1 | 6 | 61 | 36:23: 4:24 | 47 | 186 |
| 1 | 7 | 61 | 36:23:14:24 | 27 | 106 |
| 1 | 8 | 61 | 36:23:24:24 | 60 | 238 |
| 1 | 9 | 61 | 36:23:34:24 | 56 | 222 |
where:
| set | = running number for each DSN tracking pass during Jupiter encounter |
|---|---|
| no | = running number for range measurement within each tracking pass |
| dss | = DSN station number |
| doy | = Day of year in 1992 |
| hh:mm:ss | = hours, minutes seconds (UT, ground received) |
| difrng | = differential range delay in `range units' [DSN810-5] |
| econt | = electron content in `hexems' [Bird et al., 1992b] |
| difrng (RU) and econt (hexems) are given to the nearest respective unit. The estimated accuracy of a differential range measurement is of the order of 50 range units. |
Asmar, S.W., R.G. Herrera, and T. Priest, Radio Science Handbook
, JPL D-7938 Volume 6,
Jet Propulsion Laboratory, Pasadena, CA, 1995.
Asmar, S.W., and N.A. Renzetti, The Deep Space Network as
an Instrument for Radio Science Research , Jet Propulsion
Laboratory Publication 80-93, Rev. 1, 15 April 1993.
Bird, M.K., S.W. Asmar, J.P. Brenkle, P. Edenhofer, M. Paetzold,
and H. Volland, The coronal-sounding experiment,
Astron. Astrophys. Supp. Ser. 92 , 425-430, 1992a.
Bird, M.K., S.W. Asmar, J.P. Brenkle, P. Edenhofer, O. Funke,
M. Paetzold, and H. Volland, Ulysses radio occultation observations
of the Io plasma torus during the Jupiter encounter,
Science 257 , 1531-1535, 1992b.
Bird, M.K., S.W. Asmar, P. Edenhofer, O. Funke, M. Paetzold,
and H. Volland, The structure of Jupiter's Io plasma torus
inferred from Ulysses radio occultation observations,
Planet. Space Sci. 41 , 999-1010, 1993.
Bird, M.K., H. Volland, M. Paetzold, P. Edenhofer, S,W, Asmar,
and J.P. Brenkle, The coronal electron density distribution
determined from dual-frequency ranging measurements during
the 1991 solar conjunction of the Ulysses spacecraft,
Astrophys. J. 426 , 373-381, 1994.
Bird, M.K., M. Paetzold, M., P. Edenhofer, S.W. Asmar, and
T.P. McElrath, Coronal radio sounding with Ulysses: solar wind
electron density near 0.1 AU during the 1995 conjunction,
Astron. Astrophys. (in press) , 1996.
Deep Space Network / Flight Project Interface Design Book ,
Document 810-5, Jet Propulsion Laboratory, Pasadena, CA.
Deep Space Network System Requirements / Detailed
Interface Design , Document 820-13,
Jet Propulsion Laboratory, Pasadena, CA.
Paetzold, M., M.K. Bird, H. Volland, P. Edenhofer, S.W. Asmar,
and J.P. Brenkle, Coronal sounding with Ulysses: Preliminary results
from the first solar conjunction, in Solar Wind Seven ,
E. Marsch and R. Schwenn (eds.), Pergamon Press, Oxford, 237-240, 1992.
Paetzold, M., M.K. Bird, P. Edenhofer, S.W. Asmar, and
T.P. McElrath, Dual-frequency radio sounding of the solar corona
during the 1995 conjunction of the Ulysses spacecraft,
Geophys. Res. Lett. 22 , 3313-3316, 1995.
Paetzold, M., J. Karl, and M.K. Bird, Coronal radio sounding with
Ulysses: Dual-frequency phase spectra in coronal holes and streamers,
Astron. Astrophys. (in press) , 1996.
Woo, R., Detection of low-latitude plumes in the outer
corona by Ulysses radio ranging measurements,
Astrophys. J. 464 , L95-L98, 1996.
Woo, R., J.W. Armstrong, M.K. Bird and M. Paetzold,
Variation of fractional electron density fluctuations
inside 40 R_s observed by Ulysses ranging measurements,
Geophys. Res. Lett. 22 , 329-332, 1995a.
Woo, R., J.W. Armstrong, M.K. Bird and M. Paetzold,
Fine-scale filamentary structure in coronal streamers,
Astrophys. J. 449 , L91-L94, 1995b.