Simultaneous Nadir Overpasses (SNOs) between GOES-17 and NPP
TLE Epoch: 2020 7 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)
 07/20/2020   22:33:49   (  -0.01,-137.19) (  -0.09,-137.53)   38.33                80
 07/21/2020   22:17:45   (  -0.01,-137.19) (   0.90,-132.99)  477.85                80
 07/23/2020   10:39:34   (   0.01,-137.19) (   0.23,-138.27)  123.02                80
 07/24/2020   10:18:10   (   0.01,-137.18) (  -0.76,-133.74)  392.85                80
 07/25/2020   22:40:07   (  -0.01,-137.17) (  -0.43,-139.04)  212.91                80
 07/26/2020   22:24:02   (  -0.02,-137.17) (   0.56,-134.51)  302.63                80
 07/28/2020   10:43:11   (   0.02,-137.16) (   0.63,-139.78)  299.24                80
 07/29/2020   10:27:07   (   0.02,-137.14) (  -0.42,-135.25)  215.90                80
 07/30/2020   22:46:24   (  -0.03,-137.12) (  -0.82,-140.55)  391.10                80
 07/31/2020   22:30:20   (  -0.03,-137.11) (   0.23,-136.03)  123.65                80
 08/02/2020   10:49:28   (   0.04,-137.09) (   0.96,-141.29)  479.34                80