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Spacecraft-spacecraft very long baseline interferometry. part 1: error modeling and observable accuracy
| Content Provider | NASA Technical Reports Server (NTRS) |
|---|---|
| Author | Border, J. S. Edwards Jr., C. D. |
| Copyright Year | 1992 |
| Description | In Part 1 of this two-part article, an error budget is presented for Earth-based delta differential one-way range (delta DOR) measurements between two spacecraft. Such observations, made between a planetary orbiter (or lander) and another spacecraft approaching that planet, would provide a powerful target-relative angular tracking data type for approach navigation. Accuracies of better than 5 nrad should be possible for a pair of spacecraft with 8.4-GHz downlinks, incorporating 40-MHz DOR tone spacings, while accuracies approaching 1 nrad will be possible if the spacecraft incorporate 32-GHz downlinks with DOR tone spacing on the order of 250 MHz; these accuracies will be available for the last few weeks or months of planetary approach for typical Earth-Mars trajectories. Operational advantages of this data type are discussed, and ground system requirements needed to enable spacecraft-spacecraft delta DOR observations are outlined. This tracking technique could be demonstrated during the final approach phase of the Mars '94 mission, using Mars Observer as the in-orbit reference spacecraft, if the Russian spacecraft includes an 8.4-GHz downlink incorporating DOR tones. Part 2 of this article will present an analysis of predicted targeting accuracy for this scenario. |
| File Size | 994317 |
| Page Count | 14 |
| File Format | |
| Alternate Webpage(s) | http://archive.org/details/NASA_NTRS_Archive_19930010229 |
| Archival Resource Key | ark:/13960/t6xw9bc5p |
| Language | English |
| Publisher Date | 1992-08-15 |
| Access Restriction | Open |
| Subject Keyword | Communications And Radar Downlinking Radio Signals Ionospheres Error Analysis Very Long Base Interferometry Signal To Noise Ratios Troposphere Orbital Position Estimation Interplanetary Navigation Solar Wind Spacecraft Tracking Rangefinding Ntrs Nasa Technical Reports Server (ntrs) Nasa Technical Reports Server Aerodynamics Aircraft Aerospace Engineering Aerospace Aeronautic Space Science |
| Content Type | Text |
| Resource Type | Article |
