Simultaneous Nadir Overpasses (SNOs) between GOES-15 and NPP
TLE Epoch: 2021 2 11.  Predictions up to the next  14.0 days:

     Date     Time(GOES-15)   GOES-15 Lat/Lon  NPP Lat/Lon    Distance(km)  Time Diff(sec)
 02/12/2021   10:13:41   (   0.45,-127.64) (   1.35,-131.73)  465.72                80
 02/13/2021   09:52:17   (   0.44,-127.68) (   0.33,-127.20)   54.65                80
 02/15/2021   21:58:09   (  -0.45,-127.81) (  -0.47,-127.98)   18.45                80
 02/18/2021   10:01:11   (   0.46,-127.87) (   0.66,-128.71)   95.64                80
 02/19/2021   09:39:47   (   0.45,-127.91) (  -0.37,-124.18)  424.26                80
 02/20/2021   22:04:23   (  -0.48,-127.99) (  -0.80,-129.49)  170.46                80
 02/21/2021   21:42:59   (  -0.47,-128.02) (   0.23,-124.96)  349.20                80
 02/23/2021   10:07:26   (   0.49,-128.04) (   0.98,-130.23)  249.57                80
 02/24/2021   09:46:02   (   0.49,-128.06) (  -0.05,-125.70)  269.61                80