Saturday, March 22, 2008

Beacon details for SDG-9

The beacon is transmitting the following string on 29.499 Mhz using conventional CW:

DE KA2QPG BLN F 000 A 000 EMAIL ROCHTE AT GMAIL.COM AR

Where the number following "F" is the frame counter, incrementing with each transmission, and the number following "A" is a numeric code representing temperature. Below is a table of numeric values and associated temperatures in Celsius.

"A"Temp
058-50
070-45
085-40
101-35
117-30
133-25
148-20
163-15
176-10
188-5
1980


Note that both the "A" value and the frequency of the beacon will drift significantly downward after local sunset for the balloon.

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