Simultaneous Nadir Overpasses (SNOs) between GOES-15 and NPP
TLE Epoch: 2020 7 26.  Predictions up to the next  14.0 days:

     Date     Time(GOES-15)   GOES-15 Lat/Lon  NPP Lat/Lon    Distance(km)  Time Diff(sec)
 07/27/2020   22:02:06   (  -0.03,-128.37) (  -0.30,-129.56)  135.66                80
 07/28/2020   21:46:02   (  -0.03,-128.36) (   0.69,-125.02)  380.23                80
 07/30/2020   10:07:51   (   0.00,-128.41) (   0.43,-130.31)  215.70                80
 07/31/2020   09:46:28   (  -0.02,-128.41) (  -0.62,-125.78)  299.26                80
 08/01/2020   22:08:24   (   0.01,-128.34) (  -0.62,-131.08)  313.00                80
 08/02/2020   21:52:21   (   0.01,-128.33) (   0.43,-126.56)  202.51                80
 08/04/2020   10:14:09   (  -0.01,-128.37) (   0.75,-131.83)  393.04                80
 08/05/2020   09:52:44   (  -0.01,-128.37) (  -0.24,-127.29)  122.24                80
 08/06/2020   22:14:42   (   0.01,-128.29) (  -0.94,-132.60)  490.50                80
 08/07/2020   21:58:37   (   0.01,-128.28) (   0.06,-128.06)   24.78                80