Simultaneous Nadir Overpasses (SNOs) between GOES-17 and NPP
TLE Epoch: 2020 1 20.  Predictions up to the next  14.0 days:

     Date     Time(GOES-17)   GOES-17 Lat/Lon  NPP Lat/Lon    Distance(km)  Time Diff(sec)
 01/20/2020   22:48:35   (  -0.04,-137.21) (  -0.79,-140.50)  375.47                80
 01/21/2020   22:27:09   (  -0.04,-137.21) (   0.23,-135.97)  140.66                80
 01/23/2020   10:51:35   (   0.05,-137.19) (   0.97,-141.23)  461.19                80
 01/24/2020   10:30:10   (   0.05,-137.18) (  -0.05,-136.70)   54.57                80
 01/26/2020   22:36:00   (  -0.06,-137.16) (  -0.10,-137.47)   34.48                80
 01/27/2020   22:14:34   (  -0.05,-137.15) (   0.91,-132.93)  481.15                80
 01/29/2020   10:39:01   (   0.06,-137.13) (   0.28,-138.20)  121.45                80
 01/30/2020   10:17:35   (   0.06,-137.11) (  -0.73,-133.66)  393.77                80
 01/31/2020   22:42:10   (  -0.07,-137.10) (  -0.48,-138.95)  211.73                80
 02/01/2020   22:20:44   (  -0.06,-137.08) (   0.53,-134.42)  303.18                80