Simultaneous Nadir Overpasses (SNOs) between GOES-15 and NPP
TLE Epoch: 2020 9 23.  Predictions up to the next  14.0 days:

     Date     Time(GOES-15)   GOES-15 Lat/Lon  NPP Lat/Lon    Distance(km)  Time Diff(sec)
 09/23/2020   22:17:41   (   0.12,-128.33) (  -0.87,-132.62)  489.79                80
 09/24/2020   21:56:17   (   0.12,-128.34) (   0.20,-128.11)   27.80                80
 09/27/2020   09:59:21   (  -0.13,-128.41) (  -0.03,-128.84)   48.91                80
 09/28/2020   09:43:17   (  -0.13,-128.42) (  -1.04,-124.31)  468.68                80
 09/29/2020   22:05:13   (   0.13,-128.40) (  -0.16,-129.61)  138.48                80
 09/30/2020   21:43:49   (   0.13,-128.41) (   0.85,-125.08)  378.90                80
 10/02/2020   10:05:38   (  -0.13,-128.46) (   0.26,-130.36)  215.71                80
 10/03/2020   09:49:33   (  -0.13,-128.47) (  -0.75,-125.83)  301.69                80
 10/04/2020   22:11:30   (   0.13,-128.44) (  -0.45,-131.13)  305.67                80
 10/05/2020   21:50:05   (   0.13,-128.44) (   0.56,-126.60)  211.04                80
 10/07/2020   10:11:54   (  -0.13,-128.48) (   0.61,-131.87)  385.16                80