Simultaneous Nadir Overpasses (SNOs) between GOES-17 and NPP
TLE Epoch: 2020 1 13.  Predictions up to the next  14.0 days:

     Date     Time(GOES-17)   GOES-17 Lat/Lon  NPP Lat/Lon    Distance(km)  Time Diff(sec)
 01/14/2020   10:17:49   (   0.03,-137.21) (  -0.72,-133.71)  398.95                80
 01/15/2020   22:42:24   (  -0.04,-137.21) (  -0.45,-139.01)  204.72                80
 01/16/2020   22:20:59   (  -0.03,-137.22) (   0.56,-134.47)  312.06                80
 01/18/2020   10:45:25   (   0.04,-137.22) (   0.63,-139.74)  287.95                80
 01/19/2020   10:23:59   (   0.04,-137.21) (  -0.38,-135.20)  228.39                80
 01/20/2020   22:48:35   (  -0.05,-137.20) (  -0.78,-140.51)  376.45                80
 01/21/2020   22:27:09   (  -0.05,-137.20) (   0.23,-135.97)  139.60                80
 01/23/2020   10:51:36   (   0.06,-137.19) (   0.96,-141.23)  461.32                80
 01/24/2020   10:30:10   (   0.06,-137.18) (  -0.05,-136.70)   54.30                80
 01/26/2020   22:35:59   (  -0.06,-137.15) (  -0.15,-137.46)   35.99                80