Simultaneous Nadir Overpasses (SNOs) between GOES-15 and NPP
TLE Epoch: 2019 4 22.  Predictions up to the next  14.0 days:

     Date     Time(GOES-15)   GOES-15 Lat/Lon  NPP Lat/Lon    Distance(km)  Time Diff(sec)
 04/23/2019   10:07:38   (   0.06,-127.84) (   0.58,-130.27)  276.89                80
 04/24/2019   09:46:14   (   0.06,-127.87) (  -0.40,-125.74)  242.86                80
 04/25/2019   22:08:12   (  -0.06,-127.92) (  -0.73,-131.06)  356.40                80
 04/26/2019   21:52:08   (  -0.07,-127.96) (   0.25,-126.52)  163.42                80
 04/28/2019   10:13:57   (   0.06,-128.00) (   0.89,-131.80)  432.54                80
 04/29/2019   09:52:32   (   0.07,-128.03) (  -0.09,-127.27)   86.89                80
 05/01/2019   21:58:26   (  -0.07,-128.11) (  -0.05,-128.05)    6.14                80
 05/04/2019   10:01:31   (   0.06,-128.17) (   0.21,-128.80)   71.40                80
 05/05/2019   09:40:08   (   0.06,-128.20) (  -0.84,-124.28)  447.25                80