Simultaneous Nadir Overpasses (SNOs) between GOES-17 and NPP
TLE Epoch: 2021 3 6.  Predictions up to the next  14.0 days:

     Date     Time(GOES-17)   GOES-17 Lat/Lon  NPP Lat/Lon    Distance(km)  Time Diff(sec)
 03/06/2021   22:39:51   (   0.05,-137.22) (  -0.40,-139.09)  213.64                80
 03/07/2021   22:23:47   (   0.04,-137.21) (   0.64,-134.56)  302.44                80
 03/09/2021   10:45:34   (  -0.03,-137.20) (   0.55,-139.83)  299.74                80
 03/10/2021   10:24:10   (  -0.03,-137.19) (  -0.48,-135.30)  216.11                80
 03/11/2021   22:46:05   (   0.02,-137.19) (  -0.74,-140.59)  388.28                80
 03/12/2021   22:30:01   (   0.02,-137.18) (   0.30,-136.07)  127.54                80
 03/14/2021   10:51:48   (  -0.02,-137.16) (   0.89,-141.33)  474.92                80
 03/15/2021   10:30:22   (  -0.02,-137.15) (  -0.09,-136.79)   40.48                80
 03/17/2021   22:33:33   (   0.02,-137.13) (  -0.09,-137.56)   49.85                80
 03/18/2021   22:17:29   (   0.02,-137.11) (   0.95,-133.03)  465.09                80