Simultaneous Nadir Overpasses (SNOs) between GOES-15 and NPP
TLE Epoch: 2020 7 13.  Predictions up to the next  14.0 days:

     Date     Time(GOES-15)   GOES-15 Lat/Lon  NPP Lat/Lon    Distance(km)  Time Diff(sec)
 07/14/2020   10:07:42   (   0.03,-128.38) (   0.46,-130.28)  216.61                80
 07/15/2020   09:46:19   (   0.02,-128.39) (  -0.59,-125.76)  300.38                80
 07/16/2020   22:08:15   (  -0.02,-128.35) (  -0.66,-131.05)  308.66                80
 07/17/2020   21:52:11   (  -0.01,-128.35) (   0.39,-126.53)  208.05                80
 07/19/2020   10:14:01   (   0.00,-128.41) (   0.74,-131.81)  386.75                80
 07/20/2020   09:52:36   (  -0.01,-128.41) (  -0.24,-127.27)  129.25                80
 07/21/2020   22:14:33   (   0.01,-128.36) (  -0.94,-132.58)  481.48                80
 07/22/2020   21:58:30   (   0.02,-128.36) (   0.11,-128.06)   34.67                80
 07/25/2020   10:01:34   (  -0.02,-128.40) (   0.10,-128.79)   44.90                80
 07/26/2020   09:40:10   (  -0.02,-128.40) (  -0.95,-124.27)  470.90                80