Simultaneous Nadir Overpasses (SNOs) between GOES-17 and NPP
TLE Epoch: 2020 1 21.  Predictions up to the next  14.0 days:

     Date     Time(GOES-17)   GOES-17 Lat/Lon  NPP Lat/Lon    Distance(km)  Time Diff(sec)
 01/21/2020   22:27:10   (  -0.04,-137.21) (   0.24,-135.97)  140.65                80
 01/23/2020   10:51:36   (   0.05,-137.19) (   0.95,-141.24)  461.32                80
 01/24/2020   10:30:10   (   0.05,-137.18) (  -0.07,-136.70)   54.42                80
 01/26/2020   22:35:59   (  -0.06,-137.16) (  -0.14,-137.46)   34.61                80
 01/27/2020   22:14:34   (  -0.05,-137.15) (   0.87,-132.93)  480.97                80
 01/29/2020   10:39:00   (   0.06,-137.12) (   0.32,-138.19)  121.75                80
 01/30/2020   10:17:35   (   0.06,-137.11) (  -0.69,-133.65)  393.46                80
 01/31/2020   22:42:10   (  -0.07,-137.09) (  -0.46,-138.96)  212.03                80
 02/01/2020   22:20:44   (  -0.06,-137.08) (   0.55,-134.42)  302.87                80
 02/03/2020   10:45:11   (   0.07,-137.04) (   0.64,-139.69)  300.96                80