Simultaneous Nadir Overpasses (SNOs) between GOES-17 and NPP
TLE Epoch: 2021 4 28.  Predictions up to the next  14.0 days:

     Date     Time(GOES-17)   GOES-17 Lat/Lon  NPP Lat/Lon    Distance(km)  Time Diff(sec)
 04/28/2021   22:48:26   (   0.03,-137.20) (  -0.71,-140.50)  376.66                80
 04/29/2021   22:29:41   (   0.03,-137.19) (   0.29,-135.97)  139.49                80
 05/01/2021   10:51:27   (  -0.02,-137.18) (   0.91,-141.22)  461.69                80
 05/02/2021   10:30:02   (  -0.02,-137.17) (  -0.15,-136.70)   54.05                80
 05/04/2021   22:33:12   (   0.02,-137.15) (  -0.06,-137.46)   35.57                80
 05/05/2021   22:17:07   (   0.02,-137.14) (   0.94,-132.92)  480.14                80
 05/07/2021   10:38:54   (  -0.01,-137.12) (   0.20,-138.19)  121.56                80
 05/08/2021   10:17:29   (  -0.01,-137.11) (  -0.80,-133.66)  393.87                80
 05/09/2021   22:39:24   (   0.01,-137.09) (  -0.40,-138.95)  212.17                80
 05/10/2021   22:23:18   (   0.01,-137.08) (   0.60,-134.42)  302.99                80