nRF9160 GPS timing capabilities

I would like to time-align RTC instances for two nRF9160s to within 100 ┬Ás, by synchronizing each RTC independently to a GPS 1PPS (one pulse per second) event. Does the nRF9160 GPS module make available a 1PPS signal and/or is there a GPS software event (callback) that can occur with a specified 1PPS latency variation?

In general, is there a link to documentation for the GPS module, such as a user guide, hardware reference, or software API (other than the GPS source code available on GitHub)?

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