Simultaneous Nadir Overpasses (SNOs) between GOES-15 and NPP
TLE Epoch: 2020 7 6.  Predictions up to the next  14.0 days:

     Date     Time(GOES-15)   GOES-15 Lat/Lon  NPP Lat/Lon    Distance(km)  Time Diff(sec)
 07/06/2020   21:58:19   (  -0.02,-128.22) (   0.00,-128.01)   23.23                80
 07/09/2020   10:01:24   (   0.03,-128.31) (   0.10,-128.77)   50.87                80
 07/10/2020   09:40:00   (   0.02,-128.33) (  -0.89,-124.23)  466.96                80
 07/11/2020   22:01:57   (  -0.03,-128.30) (  -0.30,-129.54)  141.07                80
 07/12/2020   21:45:53   (  -0.02,-128.31) (   0.69,-125.00)  376.79                80
 07/14/2020   10:07:42   (   0.03,-128.39) (   0.45,-130.28)  215.43                80
 07/15/2020   09:46:19   (   0.02,-128.40) (  -0.60,-125.76)  301.72                80
 07/16/2020   22:08:15   (  -0.02,-128.36) (  -0.65,-131.05)  308.08                80
 07/17/2020   21:52:12   (  -0.01,-128.36) (   0.40,-126.53)  208.82                80
 07/19/2020   10:14:01   (   0.00,-128.43) (   0.74,-131.81)  384.58                80
 07/20/2020   09:52:36   (  -0.01,-128.43) (  -0.25,-127.28)  131.62                80