Category Archives: comms

How to Talk to a 36-year-old Space Probe (ISEE-3) with GNU Radio, a USRP, and a Big Dish


As many of you have probably read, the ISEE-3 Reboot Project was able to successfully send uplink commands to the space craft. This was accomplished through a lot of team work and generous support from the community at large. Balint … Continue reading

Introducing AllAloft – The [to be] Complete Iridium-based High-Altitude Balloon System

Perhaps you’ve been reading some of my recent, and not so recent (January 2013) posts about Iridium.  Am I beginning to sound like a broken record?  Well, my excuse is that I am finally getting around to helping the California … Continue reading

Economics of Prototyping with Iridium


This post is the first in a two part series that will explain how Iridium service plans typically work. After speaking with a few individuals that plan to use Iridium for their hobbyist or professional projects, I’ve concluded that how … Continue reading

Soliciting Feedback on GNU Radio PHY/MAC Framework (Pre-Cog)

SDR Pre-Cog

A Little Background on Pre-Cog For those of you who are not familiar with the work…  I developed a GNU Radio library called pre-cog in this past Fall.  This was originally prepared for a tutorial on cognitive radio at DySPAN … Continue reading

Our Introduction to Iridium

Mission: Global, Two-Way Comms While APRS has served as the primary tracking system on our previous missions, the idea of having two-way communications capability in all geographic areas is appealing. We have investigated satellite communications for our future missions. Starting out, we considered several services, including: OrbComm Globalstar Iridium After talking with fellow balloonists and […] Continue reading

post | Comments Off January 21, 2013