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NASA-LLIS-1390
Lessons Learned – Test Telecommunications Links End-to-End, and Don't Forget the Doppler (2000)
Year: 2004
Abstract: Abstract:
A mission-critical error was discovered in the communications link between the Cassini spacecraft and its Huygens probe when it was determined that the radio frequencies would not adjust for Doppler effect. This parameter was not isolated during the pre-launch verification process. The recommendations affirm the need for (1) end-to-end testing of communications links, (2) a high fidelity telecommunications testbed, and (3) referencing Doppler effects on subcarriers in an appropriate procedure.
A mission-critical error was discovered in the communications link between the Cassini spacecraft and its Huygens probe when it was determined that the radio frequencies would not adjust for Doppler effect. This parameter was not isolated during the pre-launch verification process. The recommendations affirm the need for (1) end-to-end testing of communications links, (2) a high fidelity telecommunications testbed, and (3) referencing Doppler effects on subcarriers in an appropriate procedure.
Subject: Communication Systems
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| contributor author | NASA - National Aeronautics and Space Administration (NASA) | |
| date accessioned | 2017-09-04T17:51:59Z | |
| date available | 2017-09-04T17:51:59Z | |
| date copyright | 01/12/2004 | |
| date issued | 2004 | |
| identifier other | FAWEQCAAAAAAAAAA.pdf | |
| identifier uri | http://yse.yabesh.ir/std/handle/yse/175203 | |
| description abstract | Abstract: A mission-critical error was discovered in the communications link between the Cassini spacecraft and its Huygens probe when it was determined that the radio frequencies would not adjust for Doppler effect. This parameter was not isolated during the pre-launch verification process. The recommendations affirm the need for (1) end-to-end testing of communications links, (2) a high fidelity telecommunications testbed, and (3) referencing Doppler effects on subcarriers in an appropriate procedure. | |
| language | English | |
| title | NASA-LLIS-1390 | num |
| title | Lessons Learned – Test Telecommunications Links End-to-End, and Don't Forget the Doppler (2000) | en |
| type | standard | |
| page | 3 | |
| status | Active | |
| tree | NASA - National Aeronautics and Space Administration (NASA):;2004 | |
| contenttype | fulltext | |
| subject keywords | Communication Systems | |
| subject keywords | design margin | |
| subject keywords | Facilities | |
| subject keywords | fault tolerance | |
| subject keywords | Flight Operations | |
| subject keywords | flight readiness | |
| subject keywords | Hardware | |
| subject keywords | Independent Verification and Validation | |
| subject keywords | international partnering | |
| subject keywords | link analysis | |
| subject keywords | RF simulations | |
| subject keywords | Safety & Mission Assurance | |
| subject keywords | Spacecraft | |
| subject keywords | subcarrier test | |
| subject keywords | telecommunications design | |
| subject keywords | telecommunications failure modes | |
| subject keywords | telecommunications subcarrier | |
| subject keywords | Test & Verification | |
| subject keywords | test and integration | |
| subject keywords | Test Facility | |
| subject keywords | uplink design |