Simultaneous Nadir Overpasses (SNOs) between GOES-17 and NPP
TLE Epoch: 2021 4 7.  Predictions up to the next  14.0 days:

     Date     Time(GOES-17)   GOES-17 Lat/Lon  NPP Lat/Lon    Distance(km)  Time Diff(sec)
 04/07/2021   22:39:41   (   0.03,-137.21) (  -0.40,-139.04)  208.65                80
 04/08/2021   22:23:37   (   0.03,-137.21) (   0.64,-134.51)  307.80                80
 04/10/2021   10:45:23   (  -0.03,-137.20) (   0.57,-139.77)  293.59                80
 04/11/2021   10:23:58   (  -0.03,-137.20) (  -0.48,-135.25)  222.50                80
 04/12/2021   22:45:54   (   0.03,-137.19) (  -0.74,-140.54)  381.77                80
 04/13/2021   22:29:49   (   0.03,-137.19) (   0.31,-136.01)  134.03                80
 04/15/2021   10:51:36   (  -0.03,-137.16) (   0.91,-141.27)  468.41                80
 04/16/2021   10:30:11   (  -0.03,-137.15) (  -0.14,-136.75)   46.86                80
 04/18/2021   22:33:21   (   0.02,-137.12) (  -0.08,-137.50)   44.24                80
 04/19/2021   22:17:16   (   0.02,-137.10) (   0.97,-132.98)  470.49                80