DARTS operational Ideas G. Harles, J. Wouters (SES ASTRA) B. Fritzsche, F. Haiduk (FHG-IIS-EAS) SpaceOps 2004, Montreal

Presentation Transcript

DARTS operational Concepts G. Harles, J. Wouters (SES ASTRA) B. Fritzsche, F. Haiduk (FHG-IIS-EAS) SpaceOps 2004, Montreal DARTS Operational Concepts SpaceOps 2004 May 18 th , 2004

1A 1E 1D 1F 1G 1C 1H 1B Overview DARTS going – how can it work Operational Ranging Configurations Single Station Ranging Multi Station Ranging Multi Station Pseudo Ranging Multi station Pseudo extending Configurations, Context, Results Residuals Conclusion DARTS Operational Concepts SpaceOps 2004 May 18 th , 2004

DARTS running – how can it work (1/4) DARTS = Digital Advanced Ranging utilizing Transport Stream bundles Inserts going parcels into DVB-S payload Measures bundle landing time in uplink and downlink Is exceedingly precise and dependable Allows adaptable setups DARTS can be utilized for On-station satellite going Timing and synchronization applications Specific Features No effect on satellite operations Continuous and exact estimation information Always on framework, completely robotized ASTRA Patent DARTS Operational Concepts SpaceOps 2004 May 18 th , 2004

DARTS going – how can it work (2/4) DARTS Operational Concepts SpaceOps 2004 May 18 th , 2004

DARTS going – how can it work (3/4) DARTS Operational Concepts SpaceOps 2004 May 18 th , 2004

DARTS going – how can it work (4/4) Compact Device User well disposed establishment and operation DARTS Operational Concepts SpaceOps 2004 May 18 th , 2004

Operational Configurations (1/3) The SINGLE station following framework Distance and Azimuth/Elevation edge estimations are done from one single area. Remove estimations should be possible by TONE Range framework Spread Spectrum Range framework DARTS Range framework DARTS Operational Concepts SpaceOps 2004 May 18 th , 2004

Operational Configurations (2/3) The MULTI Station following framework Most exact framework at least three territory estimations from various areas no rakish estimations exactness relying upon spatial division and separation estimation DARTS Operational Concepts SpaceOps 2004 May 18 th , 2004

Operational Configurations (3/3) The PSEUDO Range Station following framework at least two territory estimations, one and only uplink and at least two downlinks Accuracy relying upon the spatial partition, remove estimation and synchronization DARTS Operational Concepts SpaceOps 2004 May 18 th , 2004

Performance Evaluation (1/6) Pseudo Range Configuration: BETZDORF-SEVILLA BETZDORF - BERGEN DARTS Operational Concepts SpaceOps 2004 May 18 th , 2004

Performance Evaluation (1/6) Pseudo Range Configuration: BETZDORF-SEVILLA BETZDORF - BERGEN Compared to: Multi Station Measurements: BETZDORF-SEVILLA-BERGEN DARTS Operational Concepts SpaceOps 2004 May 18 th , 2004

Performance Evaluation (1/6) Pseudo Range Configuration: BETZDORF-SEVILLA BETZDORF - BERGEN Compared to: Multi Station Measurements: BETZDORF-SEVILLA-BERGEN Mono Station Measurements: TONE Range & AZEL Mono-beat, BETZDORF DARTS Operational Concepts SpaceOps 2004 May 18 th , 2004

Performance Evaluation (2/6) Method : Orbit judgments utilizing following information of 2 entire days The circle assurance comes about have been contrasted with a best known reference circle utilizing: An entire 4 STATION Trilateration framework Betzdorf Fucino Bergen Sevilla The greatest coming about mistakes in NORMAL, RADIAL and TANGENTIAL bearing are resolved more than 7 days Assumption: All frameworks adjusted DARTS Operational Concepts SpaceOps 2004 May 18 th , 2004

Performance Evaluation (3/6) Results: DARTS Operational Concepts SpaceOps 2004 May 18 th , 2004

Performance Evaluation (4/6) TONE territory and AZIMUTH/ELEVATION Residuals Range lingering amongst +5m and –5m DARTS Operational Concepts SpaceOps 2004 May 18 th , 2004

Performance Evaluation (5/6) Spread Spectrum and DARTS Range Residuals Range leftover amongst +0.5m and –0.5m DARTS Operational Concepts SpaceOps 2004 May 18 th , 2004

Performance Evaluation (6/6) PSEUDO range Residuals BTZ12/PSE#1 :Betzdorf - > Sevilla SA#12/PSE#2 :Betzdorf - > Bergen Range remaining amongst +8m and –8m DARTS Operational Concepts SpaceOps 2004 May 18 th , 2004

Conclusions DARTS benefits from ASTRA's legacy of experience for exact, payload based, satellite going frameworks Device accuracy: down to 5 cm Single Station: cost-effective - straightforward operation Multi-station: replaces mono-beat following reception apparatus, 3x better execution, 1:5 cost decrease, quick setup Ranging and circle assurance arrangements can be customized to any administrator's needs DARTS Operational Concepts SpaceOps 2004 May 18 th , 2004

Contact: Guy Harles Tel.: +352 710725 574 guy.harles@ses-astra.com Info.techcom@ses-astra.com www. ses-astra.com Thank You! DARTS Operational Concepts SpaceOps 2004 May 18 th , 2004

Backup Slides: Pseudo idea Issues:  Synchronization clockA-clockB  Cross gadget adjustment (ulA)+(dlB) DARTS Operational Concepts SpaceOps 2004 May 18 th , 2004

Backup Slides: Handling of Delays DARTS Operational Concepts SpaceOps 2004 May 18 th , 2004