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)
 10/01/2019   09:49:29   (   0.30,-127.58) (  -0.11,-125.71)  212.75                80
 10/02/2019   22:08:46   (  -0.28,-127.48) (  -1.05,-131.02)  402.84                80
 10/03/2019   21:52:40   (  -0.29,-127.44) (  -0.08,-126.48)  109.17                80
 10/05/2019   10:11:49   (   0.27,-127.41) (   1.21,-131.76)  495.50                80
 10/06/2019   09:55:43   (   0.27,-127.36) (   0.24,-127.23)   15.92                80
 10/08/2019   21:56:14   (  -0.26,-127.21) (  -0.42,-128.00)   89.50                80
 10/09/2019   21:40:08   (  -0.27,-127.17) (   0.56,-123.46)  422.13                80
 10/11/2019   09:59:17   (   0.24,-127.13) (   0.58,-128.74)  182.78                80
 10/12/2019   09:43:11   (   0.25,-127.09) (  -0.40,-124.21)  328.44                80
 10/13/2019   22:02:27   (  -0.23,-126.97) (  -0.81,-129.51)  289.46                80