Simultaneous Nadir Overpasses (SNOs) between GOES-17 and NPP
TLE Epoch: 2020 1 19.  Predictions up to the next  14.0 days:

     Date     Time(GOES-17)   GOES-17 Lat/Lon  NPP Lat/Lon    Distance(km)  Time Diff(sec)
 01/19/2020   10:24:00   (   0.03,-137.21) (  -0.44,-135.21)  228.27                80
 01/20/2020   22:48:35   (  -0.04,-137.21) (  -0.79,-140.50)  375.48                80
 01/21/2020   22:27:09   (  -0.04,-137.21) (   0.22,-135.97)  140.72                80
 01/23/2020   10:51:35   (   0.05,-137.19) (   0.97,-141.23)  460.93                80
 01/24/2020   10:30:10   (   0.05,-137.18) (  -0.04,-136.70)   54.91                80
 01/26/2020   22:36:00   (  -0.06,-137.16) (  -0.11,-137.47)   34.11                80
 01/27/2020   22:14:34   (  -0.05,-137.16) (   0.91,-132.93)  481.55                80
 01/29/2020   10:39:01   (   0.06,-137.13) (   0.28,-138.20)  120.82                80
 01/30/2020   10:17:35   (   0.06,-137.12) (  -0.73,-133.66)  394.45                80
 01/31/2020   22:42:09   (  -0.06,-137.10) (  -0.48,-138.95)  211.09                80
 02/01/2020   22:20:44   (  -0.06,-137.09) (   0.53,-134.42)  303.89                80