OEMV NVM Stored Almanac Expiry Rule

Q.) How long is the almanac data stored in the NVM before it expires if the receiver is not used for a few weeks?

A.) The maximum time that an almanac (GPS, GLONASS, WAAS) that is stored in NVM will be used is 90 days. The OEMV GPS receiver will automatically download a new almanac and store it to NVM after 15 to 20 minutes of uninterrupted tracking.