Simultaneous Nadir Overpasses (SNOs) between GOES-15 and NPP
TLE Epoch: 2021 8 3.  Predictions up to the next  14.0 days:

     Date     Time(GOES-15)   GOES-15 Lat/Lon  NPP Lat/Lon    Distance(km)  Time Diff(sec)
 08/03/2021   09:49:40   (  -0.15,-127.99) (  -0.60,-125.92)  236.05                80
 08/04/2021   22:08:58   (   0.17,-127.93) (  -0.59,-131.23)  376.29                80
 08/05/2021   21:52:54   (   0.17,-127.95) (   0.46,-126.70)  142.37                80
 08/07/2021   10:12:03   (  -0.19,-128.08) (   0.68,-131.98)  444.96                80
 08/08/2021   09:55:59   (  -0.18,-128.10) (  -0.31,-127.45)   73.56                80
 08/10/2021   21:56:33   (   0.19,-128.04) (   0.17,-128.23)   21.22                80
 08/11/2021   21:40:28   (   0.18,-128.06) (   1.15,-123.70)  496.98                80
 08/13/2021   09:59:38   (  -0.20,-128.18) (  -0.02,-128.98)   91.24                80
 08/14/2021   09:43:33   (  -0.19,-128.19) (  -1.01,-124.44)  426.63                80
 08/15/2021   22:02:50   (   0.21,-128.11) (  -0.18,-129.75)  187.44                80
 08/16/2021   21:46:47   (   0.21,-128.12) (   0.87,-125.23)  329.72                80