Propagation Frequency Evaluations

2 part numbers

50400001 Digital Ionospheric Sounding System NSN 6660-01-148-4205 Cross Reference: 82-033A, AN/FMQ-12

-80.0/+160.0 degrees fahrenheit storage tempurature range
digital ionospheric sounding system joint electronics type designation system item name
an/fmq-12 joint electronics type designation system item type number
31m1-2fmq12-4 reference data and literature

MODEL SI Riometer NSN 6660-01-631-6298