Simultaneous Nadir Overpasses (SNOs) between GOES-17 and NPP
TLE Epoch: 2020 7 18.  Predictions up to the next  14.0 days:

     Date     Time(GOES-17)   GOES-17 Lat/Lon  NPP Lat/Lon    Distance(km)  Time Diff(sec)
 07/18/2020   10:30:36   (   0.03,-137.20) (  -0.08,-136.75)   51.40                80
 07/20/2020   22:36:29   (  -0.03,-137.19) (  -0.12,-137.52)   38.12                80
 07/21/2020   22:15:05   (  -0.03,-137.18) (   0.93,-133.00)  477.65                80
 07/23/2020   10:36:54   (   0.03,-137.17) (   0.26,-138.26)  124.01                80
 07/24/2020   10:20:49   (   0.03,-137.17) (  -0.73,-133.73)  391.39                80
 07/25/2020   22:40:06   (  -0.03,-137.15) (  -0.46,-139.04)  215.04                80
 07/26/2020   22:24:03   (  -0.03,-137.14) (   0.59,-134.51)  300.07                80
 07/28/2020   10:43:11   (   0.03,-137.12) (   0.60,-139.78)  302.70                80
 07/29/2020   10:27:07   (   0.02,-137.11) (  -0.39,-135.25)  211.86                80
 07/30/2020   22:46:25   (   0.02,-137.08) (  -0.74,-140.57)  396.92                80
 07/31/2020   22:30:21   (   0.02,-137.06) (   0.25,-136.03)  117.36                80