Simultaneous Nadir Overpasses (SNOs) between GOES-17 and NPP
TLE Epoch: 2020 12 4.  Predictions up to the next  14.0 days:

     Date     Time(GOES-17)   GOES-17 Lat/Lon  NPP Lat/Lon    Distance(km)  Time Diff(sec)
 12/04/2020   10:26:51   (   0.00,-137.22) (  -0.43,-135.24)  224.89                80
 12/05/2020   22:46:06   (   0.00,-137.20) (  -0.75,-140.54)  381.08                80
 12/06/2020   22:30:01   (   0.00,-137.19) (   0.26,-136.01)  134.55                80
 12/08/2020   10:49:07   (  -0.01,-137.18) (   0.92,-141.27)  467.30                80
 12/09/2020   10:33:01   (  -0.00,-137.16) (  -0.09,-136.74)   47.97                80
 12/11/2020   22:33:31   (  -0.00,-137.12) (  -0.08,-137.51)   44.14                80
 12/12/2020   22:17:26   (  -0.00,-137.10) (   0.94,-132.97)  470.61                80
 12/14/2020   10:39:12   (   0.01,-137.07) (   0.24,-138.24)  132.70                80
 12/15/2020   10:17:46   (   0.01,-137.05) (  -0.71,-133.69)  381.46                80
 12/16/2020   22:39:41   (  -0.00,-137.00) (  -0.46,-139.00)  227.33                80
 12/17/2020   22:23:35   (  -0.00,-136.98) (   0.56,-134.46)  286.60                80