Simultaneous Nadir Overpasses (SNOs) between GOES-15 and NPP
TLE Epoch: 2019 9 30.  Predictions up to the next  14.0 days:

     Date     Time(GOES-15)   GOES-15 Lat/Lon  NPP Lat/Lon    Distance(km)  Time Diff(sec)
 09/30/2019   10:05:35   (   0.29,-127.62) (   0.85,-130.25)  299.33                80
 10/01/2019   09:49:30   (   0.30,-127.58) (  -0.12,-125.71)  212.74                80
 10/02/2019   22:08:46   (  -0.28,-127.48) (  -1.04,-131.02)  402.65                80
 10/03/2019   21:52:40   (  -0.29,-127.44) (  -0.07,-126.48)  109.41                80
 10/05/2019   10:11:48   (   0.27,-127.41) (   1.26,-131.75)  495.32                80
 10/06/2019   09:55:43   (   0.27,-127.37) (   0.23,-127.23)   16.19                80
 10/08/2019   21:56:14   (  -0.26,-127.22) (  -0.41,-128.00)   89.05                80
 10/09/2019   21:40:09   (  -0.27,-127.17) (   0.56,-123.46)  422.64                80
 10/11/2019   09:59:17   (   0.24,-127.14) (   0.57,-128.75)  182.35                80
 10/12/2019   09:43:11   (   0.25,-127.09) (  -0.40,-124.21)  328.92                80
 10/13/2019   22:02:27   (  -0.23,-126.98) (  -0.81,-129.51)  288.77                80