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

     Date     Time(GOES-17)   GOES-17 Lat/Lon  NPP Lat/Lon    Distance(km)  Time Diff(sec)
 06/18/2020   22:36:15   (  -0.01,-137.19) (  -0.08,-137.50)   34.85                80
 06/19/2020   22:14:50   (  -0.00,-137.19) (   0.96,-132.97)  481.32                80
 06/21/2020   10:39:18   (  -0.00,-137.19) (   0.22,-138.24)  119.63                80
 06/22/2020   10:17:52   (  -0.01,-137.18) (  -0.76,-133.70)  396.02                80
 06/23/2020   22:42:29   (   0.01,-137.16) (  -0.39,-139.00)  209.95                80
 06/24/2020   22:23:43   (   0.01,-137.15) (   0.59,-134.46)  305.40                80
 06/26/2020   10:45:30   (  -0.01,-137.13) (   0.59,-139.73)  296.68                80
 06/27/2020   10:24:06   (  -0.01,-137.12) (  -0.45,-135.20)  218.42                80
 06/28/2020   22:46:01   (   0.01,-137.09) (  -0.76,-140.50)  388.42                80
 06/29/2020   22:29:56   (   0.01,-137.07) (   0.23,-135.96)  126.36                80
 07/01/2020   10:49:03   (  -0.01,-137.04) (   0.95,-141.22)  476.82                80