Simultaneous Nadir Overpasses (SNOs) between GOES-17 and NPP
TLE Epoch: 2020 4 18.  Predictions up to the next  14.0 days:

     Date     Time(GOES-17)   GOES-17 Lat/Lon  NPP Lat/Lon    Distance(km)  Time Diff(sec)
 04/19/2020   10:18:05   (  -0.02,-137.19) (  -0.79,-133.80)  386.12                80
 04/20/2020   22:40:01   (   0.02,-137.19) (  -0.40,-139.10)  218.12                80
 04/21/2020   22:23:56   (   0.02,-137.18) (   0.62,-134.57)  298.12                80
 04/23/2020   10:45:44   (  -0.02,-137.18) (   0.58,-139.84)  303.02                80
 04/24/2020   10:24:19   (  -0.02,-137.17) (  -0.44,-135.31)  212.63                80
 04/25/2020   22:46:16   (   0.02,-137.16) (  -0.75,-140.61)  393.17                80
 04/26/2020   22:30:11   (   0.02,-137.15) (   0.28,-136.08)  122.09                80
 04/28/2020   10:51:58   (  -0.01,-137.13) (   0.92,-141.34)  480.51                80
 04/29/2020   10:30:34   (  -0.01,-137.11) (  -0.10,-136.81)   34.19                80
 05/01/2020   22:33:45   (   0.00,-137.06) (  -0.12,-137.57)   59.07                80