Oct 2010

v1.5 Approved and Time Surprise

Satellites v1.5 has just been approved and is appearing in the App Store.

This evening, while preparing to catch an Iridium flare, I noticed something I had not expected on my iPhone -- the iPhone clock was 40 seconds fast. For many purposes, this probably doesn't make much difference, but for satellite tracking, with ISS traveling at 5 miles a second, that's a 200 mile error.

I'm giving some consideration to obtaining accurate 'real time' from network time protocol (ntp) servers. As
Satellites gets more sophisticated, having the iPhone clock be so far in error will be a problem.