Simultaneous Nadir Overpasses (SNOs) between GOES-15 and NPP
TLE Epoch: 2019 10 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)
 10/22/2019   09:55:43   (   0.20,-128.27) (  -0.01,-127.30)  111.13                80
 10/23/2019   22:14:59   (  -0.17,-128.26) (  -1.14,-132.61)  495.46                80
 10/24/2019   21:58:54   (  -0.19,-128.28) (  -0.16,-128.07)   23.60                80
 10/27/2019   09:59:17   (   0.18,-128.38) (   0.30,-128.82)   50.77                80
 10/28/2019   09:43:12   (   0.19,-128.40) (  -0.74,-124.29)  467.88                80
 10/29/2019   22:02:27   (  -0.17,-128.37) (  -0.46,-129.59)  139.58                80
 10/30/2019   21:46:23   (  -0.18,-128.39) (   0.58,-125.07)  378.85                80
 11/01/2019   10:05:30   (   0.15,-128.46) (   0.60,-130.34)  215.04                80
 11/02/2019   09:49:26   (   0.16,-128.47) (  -0.45,-125.82)  302.93                80
 11/03/2019   22:08:41   (  -0.13,-128.44) (  -0.76,-131.12)  305.69                80