Simultaneous Nadir Overpasses (SNOs) between GOES-15 and NPP
TLE Epoch: 2020 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)
 08/21/2020   09:55:31   (  -0.04,-127.86) (  -0.19,-127.29)   65.80                80
 08/23/2020   21:56:03   (   0.04,-127.73) (  -0.05,-128.05)   37.35                80
 08/24/2020   21:39:59   (   0.04,-127.69) (   1.01,-123.53)  474.82                80
 08/26/2020   09:59:07   (  -0.05,-127.67) (   0.23,-128.79)  128.47                80
 08/27/2020   09:43:03   (  -0.05,-127.62) (  -0.83,-124.27)  383.14                80
 08/28/2020   22:02:19   (   0.06,-127.51) (  -0.40,-129.56)  233.55                80
 08/29/2020   21:46:15   (   0.06,-127.47) (   0.60,-125.03)  277.92                80
 08/31/2020   10:05:23   (  -0.07,-127.44) (   0.57,-130.30)  325.84                80
 09/01/2020   09:49:19   (  -0.07,-127.39) (  -0.43,-125.77)  185.59                80
 09/02/2020   22:08:35   (   0.07,-127.28) (  -0.80,-131.06)  431.27                80
 09/03/2020   21:52:31   (   0.07,-127.24) (   0.20,-126.53)   80.21                80