Simultaneous Nadir Overpasses (SNOs) between GOES-15 and NPP
TLE Epoch: 2021 1 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)
 01/23/2021   09:46:05   (   0.30,-127.82) (  -0.19,-125.72)  239.84                80
 01/24/2021   22:10:41   (  -0.34,-127.82) (  -1.06,-131.01)  363.52                80
 01/25/2021   21:49:16   (  -0.32,-127.79) (  -0.04,-126.48)  148.84                80
 01/27/2021   10:13:43   (   0.36,-127.69) (   1.25,-131.75)  461.94                80
 01/28/2021   09:52:19   (   0.34,-127.65) (   0.23,-127.22)   50.05                80
 01/30/2021   21:58:10   (  -0.37,-127.61) (  -0.45,-127.98)   42.75                80
 01/31/2021   21:36:45   (  -0.34,-127.57) (   0.58,-123.45)  468.92                80
 02/02/2021   10:01:13   (   0.38,-127.46) (   0.63,-128.72)  142.90                80
 02/03/2021   09:39:47   (   0.36,-127.41) (  -0.33,-124.17)  368.51                80
 02/04/2021   22:04:23   (  -0.40,-127.40) (  -0.84,-129.48)  237.16                80
 02/05/2021   21:42:58   (  -0.38,-127.35) (   0.13,-124.94)  273.99                80