HF APRS Mobile    Receive Screen Shots   9 November 2011

These screen shots were taken during a trip from the Lansing, Michigan area to Chicago and back on 9 November 2011.   All times are Eastern Standard Time; i.e. local to the area.  Two receiving systems were being used -  MixW as an HF packet modem feeding UIview, and the new UZ7HO "soundmodem" 300 baud HF packet modem sound card app.  

Both programs were using the data from a Griffin Electronics "iMic" USB external sound system (details here) receiving the audio from a Yaesu FT-857.  In other words, both sound card apps were using the identical received signal from the identical radio through the same sound card.  

Note that I kept the computer clock on EST and continued to stamp screen caps in EASTERN time, even while I was in the CENTRAL time zone in the Chicago area.  I am citing local (US Eastern) time, rather than UTC, since HF propagation is affected by LOCAL day/night/time of day.

 

Screenshot from APRSpoint at 1127 EST    Mobile was in the Michigan City, Indiana area, just south of the MI/IN state line.

 

UIview, Precision Mapping 9.0 and MixW while mobile was in Arlington Heights, Illinois (far western suburban Chicago) at 1648 EST.  The cluster of overlapping stations are two-meter activity monitored by the Kenwood D700.  The outlying stations are 30-meter HF.  Not sure which band the KG6YRB balloon was on -- most likely 2 meters. (I've never heard of anyone putting HF on a balloon.)

 

UIview/MixW zoomed out to continental scale, showing west coast station being heard while mobile on I-290 about 7 miles due west of downtown Chicago at about 1739 EST.

 

APRSpoint & UZ7HO soundmodem on Illinois/Michigan state line about 2015 EDT in the evening.  MixW was NOT copying the two stations on the west coast at this point.