Simultaneous Nadir Overpasses (SNOs) between GOES-17 and NPP
TLE Epoch: 2020 6 21.  Predictions up to the next  14.0 days:

     Date     Time(GOES-17)   GOES-17 Lat/Lon  NPP Lat/Lon    Distance(km)  Time Diff(sec)
 06/22/2020   10:17:53   (   0.00,-137.20) (  -0.81,-133.71)  398.29                80
 06/23/2020   22:42:28   (  -0.00,-137.18) (  -0.40,-139.00)  206.94                80
 06/24/2020   22:21:03   (  -0.00,-137.18) (   0.58,-134.46)  308.85                80
 06/26/2020   10:45:30   (   0.01,-137.16) (   0.60,-139.73)  292.44                80
 06/27/2020   10:24:06   (   0.01,-137.15) (  -0.45,-135.20)  223.12                80
 06/28/2020   22:48:41   (  -0.01,-137.13) (  -0.77,-140.49)  383.00                80
 06/29/2020   22:27:17   (  -0.01,-137.12) (   0.28,-135.97)  132.11                80
 07/01/2020   10:51:44   (   0.00,-137.10) (   0.90,-141.23)  470.63                80
 07/02/2020   10:30:18   (  -0.01,-137.08) (  -0.08,-136.69)   43.93                80
 07/04/2020   22:33:29   (   0.01,-137.03) (  -0.08,-137.46)   49.27                80