The RK407 from Rakon is a an OCXO for Space Applications, dedicated to Telecom payloads. It is part of the 10-7 stability class over the temperature range with an overall frequency drift less than 2ppm over 18 years. It is designed for clocks, signal generation applications, transponders, GPS receivers, digital cards, board calculators, down and up converters, and synthesizers.
This frequency source provides a good trade-off between overall frequency stability and power consumption. It is
manufactured in accordance with MIL-PRF-55310 (Class 1, type 4, level S) and is available in a flat pack package that measures 25x25x17mm.