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Accurate Timestamp from Cellular

I'm attempting to synchronize/correlate measurements made by two separate nRF9160 devices and was hoping to use a timestamp to do so. Essentially I would like to measure the time between the same event measured by two nRF9160 based systems. Is there any way to obtained real time from the cellular network with predictable latency to achieve this? Is there any guarantee with regards to latency when reading the network time? I'm hoping for some direction with how best to achieve something like this.

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