Simultaneous Nadir Overpasses (SNOs) between GOES-17 and NPP
TLE Epoch: 2019 12 27.  Predictions up to the next  14.0 days:

     Date     Time(GOES-17)   GOES-17 Lat/Lon  NPP Lat/Lon    Distance(km)  Time Diff(sec)
 12/28/2019   10:39:27   (   0.03,-137.20) (   0.26,-138.28)  123.45                80
 12/29/2019   10:18:01   (   0.02,-137.20) (  -0.74,-133.75)  393.19                80
 12/30/2019   22:42:37   (  -0.03,-137.20) (  -0.45,-139.05)  211.29                80
 12/31/2019   22:21:11   (  -0.02,-137.20) (   0.56,-134.51)  305.18                80
 01/02/2020   10:45:38   (   0.03,-137.20) (   0.64,-139.78)  294.65                80
 01/03/2020   10:24:13   (   0.02,-137.19) (  -0.43,-135.25)  221.55                80
 01/04/2020   22:48:47   (  -0.03,-137.18) (  -0.81,-140.54)  383.71                80
 01/05/2020   22:27:23   (  -0.03,-137.18) (   0.25,-136.02)  132.11                80
 01/07/2020   10:51:49   (   0.04,-137.16) (   0.95,-141.28)  468.99                80
 01/08/2020   10:30:24   (   0.04,-137.15) (  -0.06,-136.75)   46.22                80