Simultaneous Nadir Overpasses (SNOs) between GOES-17 and NPP
TLE Epoch: 2021 3 22.  Predictions up to the next  14.0 days:

     Date     Time(GOES-17)   GOES-17 Lat/Lon  NPP Lat/Lon    Distance(km)  Time Diff(sec)
 03/23/2021   22:23:43   (   0.04,-137.20) (   0.66,-134.55)  302.89                80
 03/25/2021   10:45:29   (  -0.03,-137.21) (   0.57,-139.80)  296.14                80
 03/26/2021   10:24:05   (  -0.03,-137.21) (  -0.47,-135.28)  220.51                80
 03/27/2021   22:48:40   (   0.03,-137.20) (  -0.75,-140.57)  384.50                80
 03/28/2021   22:27:16   (   0.03,-137.20) (   0.30,-136.04)  131.82                80
 03/30/2021   10:51:43   (  -0.03,-137.20) (   0.87,-141.31)  468.30                80
 03/31/2021   10:30:17   (  -0.03,-137.19) (  -0.11,-136.77)   47.45                80
 04/02/2021   22:33:28   (   0.03,-137.16) (  -0.06,-137.54)   43.84                80
 04/03/2021   22:17:23   (   0.03,-137.14) (   0.93,-133.00)  471.35                80
 04/05/2021   10:39:10   (  -0.02,-137.13) (   0.23,-138.27)  130.26                80