Simultaneous Nadir Overpasses (SNOs) between GOES-15 and NPP
TLE Epoch: 2020 7 20.  Predictions up to the next  14.0 days:

     Date     Time(GOES-15)   GOES-15 Lat/Lon  NPP Lat/Lon    Distance(km)  Time Diff(sec)
 07/21/2020   22:14:33   (  -0.01,-128.37) (  -0.96,-132.57)  479.57                80
 07/22/2020   21:58:30   (  -0.01,-128.37) (   0.09,-128.05)   37.44                80
 07/25/2020   10:01:34   (   0.01,-128.43) (   0.11,-128.79)   40.58                80
 07/26/2020   09:40:10   (   0.01,-128.44) (  -0.94,-124.26)  475.86                80
 07/27/2020   22:02:06   (  -0.02,-128.39) (  -0.30,-129.56)  134.27                80
 07/28/2020   21:46:03   (  -0.02,-128.38) (   0.75,-125.04)  382.00                80
 07/30/2020   10:07:51   (   0.02,-128.43) (   0.44,-130.30)  213.34                80
 07/31/2020   09:46:27   (   0.03,-128.43) (  -0.55,-125.77)  302.45                80
 08/01/2020   22:08:24   (  -0.03,-128.37) (  -0.63,-131.08)  308.79                80
 08/02/2020   21:52:20   (  -0.04,-128.36) (   0.36,-126.54)  206.93                80