Simultaneous Nadir Overpasses (SNOs) between GOES-17 and NPP
TLE Epoch: 2021 3 19.  Predictions up to the next  14.0 days:

     Date     Time(GOES-17)   GOES-17 Lat/Lon  NPP Lat/Lon    Distance(km)  Time Diff(sec)
 03/20/2021   10:39:17   (  -0.05,-137.20) (   0.18,-138.31)  126.21                80
 03/21/2021   10:17:52   (  -0.04,-137.19) (  -0.81,-133.77)  389.51                80
 03/22/2021   22:39:47   (   0.04,-137.17) (  -0.41,-139.07)  216.38                80
 03/23/2021   22:23:42   (   0.03,-137.16) (   0.63,-134.54)  299.00                80
 03/25/2021   10:45:30   (  -0.02,-137.14) (   0.55,-139.81)  303.18                80
 03/26/2021   10:24:04   (  -0.02,-137.13) (  -0.43,-135.27)  211.78                80
 03/27/2021   22:46:00   (   0.02,-137.10) (  -0.78,-140.56)  395.29                80
 03/28/2021   22:29:55   (   0.02,-137.08) (   0.26,-136.04)  119.33                80
 03/30/2021   10:51:42   (  -0.02,-137.05) (   0.91,-141.30)  483.95                80
 03/31/2021   10:30:17   (  -0.02,-137.03) (  -0.07,-136.77)   30.09                80