Simultaneous Nadir Overpasses (SNOs) between GOES-15 and NPP
TLE Epoch: 2019 1 19.  Predictions up to the next  14.0 days:

     Date     Time(GOES-15)   GOES-15 Lat/Lon  NPP Lat/Lon    Distance(km)  Time Diff(sec)
 01/19/2019   22:08:48   (   0.06,-127.98) (  -0.66,-131.20)  367.53                80
 01/20/2019   21:52:42   (   0.05,-127.94) (   0.32,-126.66)  145.12                80
 01/22/2019   10:11:50   (  -0.06,-127.98) (   0.80,-131.94)  450.83                80
 01/23/2019   09:55:45   (  -0.05,-127.94) (  -0.18,-127.40)   61.55                80
 01/25/2019   21:56:15   (   0.06,-127.74) (  -0.04,-128.16)   48.15                80
 01/26/2019   21:40:09   (   0.06,-127.70) (   0.95,-123.63)  464.09                80
 01/28/2019   09:59:18   (  -0.06,-127.74) (   0.18,-128.91)  132.26                80
 01/29/2019   09:43:12   (  -0.05,-127.70) (  -0.80,-124.37)  379.83                80
 01/30/2019   22:02:27   (   0.05,-127.53) (  -0.40,-129.67)  242.67                80
 01/31/2019   21:46:22   (   0.05,-127.49) (   0.59,-125.13)  269.11                80