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New Applications Session Summary
J. Degnan and Y. Fumin
| Title of Paper |
Principal Author |
| Time Transfer by Laser Link T2l2 |
M. Ravet |
| Time Transfer by Laser Pulses between Ground Stations |
Y. Fumin |
| SLR2000C: An Autonomous Satellite Laser Ranging and Space-To-Ground
Optical Communications Facility |
J. Degnan |
| Technical Concept for a European Laser Altimeter for Planetary
Exploration |
U. Schreiber |
Laser Altimeter For Planetary Exploration |
I. Prochazka |
| Scientific Applications of Planetary Laser Altimeter Radiometry |
M. Zuber |
- Laser Time Transfer (2 papers)
- CNES T2L2 Experiment
- Myriade Microsatellite, 800 km orbit, 10
Kg, 40 W
- aluminum-coated 100 mm reflector, n = 1.8, wide FOV (120o)
- Geiger
APD, 3 psec timer, accuracy <100 psec, stability 1ps
over 1000 sec
- Simulated link between ground sites
- Shanghai Observatory
- Simulated 250 m link between two terminals
equipped with hydrogen masers
- RMS of mean clock difference = 24.1
psec for a 100s interval
- Laser vs direct comparison results comparable
- Laser Communications (1 paper)
- NASA /GSFC SLR2000C system
- Combines sub-cm ranging, 10 Gbps downlink,
10 Mbps uplink
- lasercom/ranging highly synergistic
- lasercom adds $500K to $700K
to baseline SLR2000 cost
- 12 stations provide complete LAGEOS coverage
and >99.9% station
availability with lasercom intersatellite links
- 25 stations
would support geosynchronous “bent pipe” architectures
plus deep space missions with > 99% availability
- 4
geosynchronous plus 4 polar satellites provide
100% global communications; single 10 cm retro adequate
for geo ranging link
- Laser Altimetry of Planets (3 papers)
- Laser Altimeter
for Planetary Exploration (LAPE)
- German Instrument on
Bepi-Colombo Mercury Mission
- 1 m accuracy from 300 to
1000 km altitudes (goal 1200 km)
- Power: < 30 W (goal
25W)
- Mass: <8.5 Kg (goal 7 Kg); 15 cm receive aperture
- photon-counting
approach
- Czech Technical University performing independent
analyses and developing key components (e.g.
detector)
- Active/Passive
Radiometry
- Radiance measurements by the MOLA altimeter
detector provide additional science beyond
topography, e.g. intrinsic brightness of Martian surface,
changes in polar ice caps (CO2)
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