X hits on this document

Powerpoint document

Multi-Link Iridium Satellite Data Communication System for Polar Research - page 28 / 29

71 views

0 shares

0 downloads

0 comments

28 / 29

University of Kansas

28

Lessons Learned

The call drop pattern

Increased number of call drops in Iridium-Iridium mode

The average time interval between call drops reduced from 100 minutes in case of 4 Iridium-4 PSTN system to 60 minutes in case of 8 Iridium – 8 Iridium DAV system.

Varies with time and weather

Increased call drops in presence of strong radio interference

Modem firmware failures

random modem lock ups due to bug in firmware.

Newer firmware upgrades reduced the number of such lock ups

Primary modem failure

No longer drops all the modems

Just the one modem is lost

System operates with remaining 7 modems

Document info
Document views71
Page views71
Page last viewedWed Dec 07 21:01:06 UTC 2016
Pages29
Paragraphs523
Words1831

Comments