Simultaneous Nadir Overpasses (SNOs) between GOES-17 and NPP
TLE Epoch: 2021 3 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)
 03/17/2021   22:33:34   (   0.05,-137.21) (  -0.04,-137.57)   41.25                80
 03/18/2021   22:17:30   (   0.05,-137.21) (   1.00,-133.04)  474.98                80
 03/20/2021   10:39:17   (  -0.04,-137.20) (   0.18,-138.31)  126.22                80
 03/21/2021   10:17:51   (  -0.04,-137.19) (  -0.80,-133.77)  389.49                80
 03/22/2021   22:39:48   (   0.03,-137.17) (  -0.36,-139.08)  216.31                80
 03/23/2021   22:23:42   (   0.03,-137.16) (   0.62,-134.54)  299.06                80
 03/25/2021   10:45:30   (  -0.02,-137.14) (   0.56,-139.81)  303.23                80
 03/26/2021   10:24:04   (  -0.02,-137.13) (  -0.43,-135.27)  211.71                80
 03/27/2021   22:45:59   (   0.01,-137.10) (  -0.79,-140.56)  395.26                80
 03/28/2021   22:29:55   (   0.02,-137.08) (   0.25,-136.03)  119.35                80
 03/30/2021   10:51:42   (  -0.02,-137.05) (   0.92,-141.30)  484.07                80