Two AVR system as outlined here has now been completed.
Schematic (using AD7923):
fitting the pcb into a 20mm square is proving hard, but hopefully it will prove possible, and can be sent off to batchpcb soon.
A milled enclosure has now been made for smaller Nicera sensors obtained from Chartland electronics
The plan is to fit a SMD amplifier board inside the enclosure. The design is now complete and has been sent to batchpcb.com for production
The prototype thermopile sensor unit has been epoxied to a pice of balsa that will for the back of the parachute release mechanism on the glider.