Simultaneous Nadir Overpasses (SNOs) between GOES-17 and NPP
TLE Epoch: 2020 6 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)
 06/21/2020   10:39:18   (   0.01,-137.21) (   0.23,-138.23)  117.20                80
 06/22/2020   10:17:53   (  -0.00,-137.21) (  -0.81,-133.71)  399.36                80
 06/23/2020   22:42:28   (  -0.00,-137.20) (  -0.40,-139.00)  204.89                80
 06/24/2020   22:21:04   (   0.00,-137.20) (   0.64,-134.48)  311.40                80
 06/26/2020   10:45:30   (   0.00,-137.19) (   0.59,-139.73)  289.39                80
 06/27/2020   10:24:06   (   0.00,-137.19) (  -0.45,-135.20)  226.66                80
 06/28/2020   22:48:41   (  -0.01,-137.18) (  -0.76,-140.50)  378.48                80
 06/29/2020   22:27:17   (  -0.00,-137.17) (   0.28,-135.97)  137.15                80
 07/01/2020   10:51:44   (  -0.00,-137.15) (   0.90,-141.23)  464.87                80
 07/02/2020   10:30:18   (  -0.01,-137.14) (  -0.09,-136.70)   50.27                80