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) (   0.43,-130.29)  216.61                80
 07/15/2020   09:46:18   (   0.02,-128.39) (  -0.56,-125.75)  300.38                80
 07/16/2020   22:08:15   (  -0.02,-128.35) (  -0.63,-131.06)  308.70                80
 07/17/2020   21:52:12   (  -0.01,-128.35) (   0.42,-126.53)  208.00                80
 07/19/2020   10:14:00   (   0.00,-128.41) (   0.77,-131.80)  386.74                80
 07/20/2020   09:52:37   (  -0.01,-128.41) (  -0.27,-127.28)  129.26                80
 07/21/2020   22:14:34   (   0.01,-128.36) (  -0.91,-132.59)  481.53                80
 07/22/2020   21:58:29   (   0.02,-128.36) (   0.08,-128.05)   34.56                80
 07/25/2020   10:01:34   (  -0.02,-128.40) (   0.07,-128.80)   44.75                80
 07/26/2020   09:40:10   (  -0.02,-128.40) (  -0.92,-124.26)  470.95                80