Simultaneous Nadir Overpasses (SNOs) between GOES-17 and NPP
TLE Epoch: 2021 2 20.  Predictions up to the next  14.0 days:

     Date     Time(GOES-17)   GOES-17 Lat/Lon  NPP Lat/Lon    Distance(km)  Time Diff(sec)
 02/21/2021   10:45:37   (  -0.04,-137.21) (   0.54,-139.84)  298.82                80
 02/22/2021   10:24:13   (  -0.04,-137.21) (  -0.49,-135.31)  217.45                80
 02/23/2021   22:46:08   (   0.03,-137.20) (  -0.73,-140.60)  388.01                80
 02/24/2021   22:30:04   (   0.02,-137.19) (   0.30,-136.08)  128.01                80
 02/26/2021   10:51:51   (  -0.01,-137.19) (   0.91,-141.34)  472.85                80
 02/27/2021   10:30:26   (  -0.01,-137.18) (  -0.07,-136.80)   42.66                80
 03/01/2021   22:33:37   (   0.01,-137.14) (  -0.06,-137.58)   49.13                80
 03/02/2021   22:17:32   (   0.01,-137.13) (   0.91,-133.04)  465.92                80
 03/04/2021   10:39:19   (  -0.01,-137.11) (   0.29,-138.30)  136.54                80
 03/05/2021   10:17:55   (  -0.01,-137.09) (  -0.75,-133.78)  377.92                80