Simultaneous Nadir Overpasses (SNOs) between GOES-17 and NPP
TLE Epoch: 2021 3 16.  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) (  -0.05,-137.57)   41.14                80
 03/18/2021   22:17:30   (   0.05,-137.21) (   0.99,-133.04)  475.12                80
 03/20/2021   10:39:17   (  -0.04,-137.20) (   0.19,-138.31)  126.19                80
 03/21/2021   10:17:51   (  -0.04,-137.19) (  -0.79,-133.77)  389.54                80
 03/22/2021   22:39:48   (   0.03,-137.18) (  -0.37,-139.08)  216.06                80
 03/23/2021   22:23:42   (   0.03,-137.16) (   0.61,-134.54)  299.32                80
 03/25/2021   10:45:29   (  -0.02,-137.14) (   0.57,-139.80)  303.09                80
 03/26/2021   10:24:04   (  -0.02,-137.13) (  -0.42,-135.26)  211.88                80
 03/27/2021   22:46:00   (   0.01,-137.10) (  -0.74,-140.57)  394.92                80
 03/28/2021   22:29:55   (   0.02,-137.08) (   0.24,-136.03)  119.71                80