Iridium overview SAMS polar experience with Iridium Recent deployments Future plans
Satcom systems available globally to platform operators
Low Earth Orbit and Geostationary Earth Orbit Field of View for LEO (Iridium) and GEO (Inmarsat)
Satcom systems available globally to platform operators
Satcom systems available to POLAR platform operators Argos: 6 sats, 400 bits/s (will increase) Iridium: 66 sats, 2400 bits/s (will increase)
Iridium overview
Iridium traffic
Current constellation
Replenishment plans
Dial-up + SBD modem: $1000 SBD-only modem: $400 Monthly fee: $14 - $30 Call costs: ~$1 per minute - $0.1 per kbyte for files > few kbyte
Data costs: ~$1.50 per kbyte
SAMS activities in polar science Several polar deployments Use of Iridium, Orbcomm and Argos EU GreenIce project Opportunities during IPY 2007-8 Development of new platforms for flux, hydrographic and meteo measurements
Global oceanic heat flux
Temperature record
Battery voltage
Pressure data from co-sited SVPB
Transfer times for 37kbyte file
New suitcase buoys: GPS only
9601 (‘Taladega’) SBD modem
SAMS future plans: Ice platforms for IPY Surface meteorology Net surface radiation fluxes - Kipp & Zonen CNR net radiometers
Heat flux through sea ice Ice mass balance Sub-ice CTDs GPS Web cam Iridium and Argos comms
SAMS future plans: Solar powered Iridium drifters Transparent hulls from Technocean Solar panel equatorial plane Li-ion batteries Iridium 9601 + GPS Extensive diagnostics Participation in DBCP Iridium pilot programme….
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