Simultaneous Nadir Overpasses (SNOs) between GOES-15 and NPP
TLE Epoch: 2019 8 21.  Predictions up to the next  14.0 days:

     Date     Time(GOES-15)   GOES-15 Lat/Lon  NPP Lat/Lon    Distance(km)  Time Diff(sec)
 08/21/2019   21:59:10   (   0.34,-128.43) (   0.37,-128.20)   25.43                80
 08/24/2019   09:59:34   (  -0.35,-128.45) (  -0.24,-128.95)   56.50                80
 08/25/2019   09:43:30   (  -0.35,-128.44) (  -1.26,-124.42)  459.06                80
 08/26/2019   22:02:46   (   0.37,-128.39) (   0.06,-129.72)  150.95                80
 08/27/2019   21:46:42   (   0.37,-128.38) (   1.08,-125.19)  364.37                80
 08/29/2019   10:05:50   (  -0.38,-128.40) (   0.07,-130.46)  234.66                80
 08/30/2019   09:49:45   (  -0.37,-128.38) (  -0.95,-125.93)  280.32                80
 08/31/2019   22:09:02   (   0.38,-128.33) (  -0.24,-131.23)  330.57                80
 09/01/2019   21:52:56   (   0.38,-128.31) (   0.72,-126.69)  184.48                80
 09/03/2019   10:14:45   (  -0.39,-128.33) (   0.43,-131.96)  414.62                80
 09/04/2019   09:56:00   (  -0.39,-128.31) (  -0.59,-127.43)   99.94                80