Simultaneous Nadir Overpasses (SNOs) between GOES-15 and NPP
TLE Epoch: 2021 7 14.  Predictions up to the next  14.0 days:

     Date     Time(GOES-15)   GOES-15 Lat/Lon  NPP Lat/Lon    Distance(km)  Time Diff(sec)
 07/14/2021   22:02:26   (   0.06,-127.76) (  -0.37,-129.65)  215.81                80
 07/15/2021   21:46:22   (   0.05,-127.73) (   0.61,-125.12)  296.72                80
 07/17/2021   10:05:31   (  -0.07,-127.75) (   0.55,-130.39)  302.16                80
 07/18/2021   09:49:28   (  -0.06,-127.71) (  -0.49,-125.87)  209.79                80
 07/19/2021   22:08:45   (   0.09,-127.56) (  -0.70,-131.18)  411.72                80
 07/20/2021   21:52:41   (   0.08,-127.51) (   0.29,-126.64)   99.79                80
 07/23/2021   09:55:45   (  -0.10,-127.48) (  -0.12,-127.38)   10.83                80
 07/25/2021   21:56:18   (   0.11,-127.27) (  -0.08,-128.15)  100.30                80
 07/26/2021   21:40:14   (   0.09,-127.22) (   0.90,-123.62)  411.02                80