| タイトル | Spacecraft Doppler tracking with a VLBI antenna |
| 著者（英） | Horton, T.; Brenkle, J. P.; Bertotti, B.; Comoretto, G.; Iess, L. |
| 著者所属（英） | Consiglio Nazionale delle Ricerche|Pavia Univ.|Jet Propulsion Lab., California Inst. of Tech.|Osservatorio Astrofisico di Arcetri |
| 発行日 | 1990-02-01 |
| 言語 | eng |
| 内容記述 | Preliminary results are reported from Doppler-shift measurements to the Voyager-2 spacecraft at a distance of 26 AU, obtained using the 32-m VLBI antenna at Medicina (Italy) during July and August 1988. The apparatus comprises the el-az antenna, an S-X-band receiver, a hydrogen maser to generate the reference signal, a Mark III VLBI terminal, and a digital tone extractor capable of isolating a tone of known frequency from a noisy signal and giving its phase and amplitude. A signal transmitted in S-band from the NASA Deep Space Network (DSN) station in Australia and retransmitted coherently in X-band by Voyager, was received 7 h 6 min later at Medicina and at the DSN station in Madrid. Sample data are presented graphically and shown to be of generally high quality; further in-depth analysis is under way. |
| NASA分類 | SPACE COMMUNICATIONS, SPACECRAFT COMMUNICATIONS, COMMAND AND TRACKING |
| レポートNO | 91A10441 |
| 権利 | Copyright |
| URI | https://repository.exst.jaxa.jp/dspace/handle/a-is/352471 |
|
