What is the orbiting altitude of the Iridium satellite communications system?
⢠Low Earth Orbit (LEO) vs. geostationary orbit (GEO) altitudes ⢠Typical altitude range used by Iridium and similar polarâorbiting communication satellites ⢠Effect of satellite altitude on signal delay and coverage
⢠First, recall whether Iridium satellites are in low Earth orbit or geostationary orbit. Which answer choice best matches that type of orbit? ⢠Think about why Iridium phones generally have lower timeâdelay (latency) than traditional shipboard satellite systems that use geostationary satellites. ⢠Compare the listed distances with the Earthâs radius (~3,440 nautical miles / ~3,963 statute miles). Which options are realistic for low Earth orbit vs. very high orbits?
⢠Verify which altitude range corresponds to geostationary orbit (GEO) â this will help you eliminate at least one choice immediately. ⢠Check which distances are more typical for low Earth orbit (generally a few hundred to around a thousand miles above Earth). ⢠Eliminate options that would imply very long signal travel distance and delay, which does NOT match Iridiumâs known lowâlatency behavior.
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