Simultaneous Nadir Overpasses (SNOs) between GOES-15 and NPP
TLE Epoch: 2021 1 24.  Predictions up to the next  14.0 days:

     Date     Time(GOES-15)   GOES-15 Lat/Lon  NPP Lat/Lon    Distance(km)  Time Diff(sec)
 01/24/2021   22:10:41   (  -0.34,-127.82) (  -1.06,-131.01)  363.48                80
 01/25/2021   21:49:16   (  -0.32,-127.79) (  -0.04,-126.48)  148.89                80
 01/27/2021   10:13:44   (   0.36,-127.69) (   1.25,-131.75)  461.89                80
 01/28/2021   09:52:19   (   0.34,-127.65) (   0.22,-127.22)   50.11                80
 01/30/2021   21:58:10   (  -0.37,-127.61) (  -0.45,-127.98)   42.64                80
 01/31/2021   21:36:45   (  -0.34,-127.57) (   0.58,-123.45)  469.04                80
 02/02/2021   10:01:13   (   0.38,-127.46) (   0.63,-128.72)  142.78                80
 02/03/2021   09:39:47   (   0.36,-127.42) (  -0.33,-124.18)  368.64                80
 02/04/2021   22:04:24   (  -0.40,-127.40) (  -0.84,-129.48)  237.01                80
 02/05/2021   21:42:59   (  -0.38,-127.35) (   0.18,-124.95)  274.16                80