Craig wrote:whoa, I was sure I looked at that page, some how I missed it. Thanks for making me look again, that'll definitely come in handy. So now I just to find out if I can reprogram the Lassen IQ as part of the complete datalogger kit, and whether I need that LPC Boot Serial Port Loader to do it.
The logger isn't the bit that needs to be reprogrammed. The lassen IQ itself does, and to do that you need to connect to serial port 1 on the GPS unit, (the TSIP port) and use IQChat to reconfigure the GPS to output whatever sentences you want.
Battery life won't be affected by how often the GPS sends out a packet. The GPS consumes 27mA whenever it's powered up and the rest of the logger takes up 80mA, which is mostly the SD card.
If you want to save battery life, you'll need to reprogram the logger to only power up the GPD periodically, and to manage the power on the SD card better (they take 5 to 15mA in low power mode)