Simultaneous Nadir Overpasses (SNOs) between GOES-15 and NPP
TLE Epoch: 2019 4 24.  Predictions up to the next  14.0 days:

     Date     Time(GOES-15)   GOES-15 Lat/Lon  NPP Lat/Lon    Distance(km)  Time Diff(sec)
 04/25/2019   22:08:12   (  -0.06,-127.93) (  -0.73,-131.06)  356.34                80
 04/26/2019   21:52:08   (  -0.07,-127.96) (   0.25,-126.52)  163.38                80
 04/28/2019   10:13:57   (   0.06,-128.00) (   0.89,-131.80)  433.13                80
 04/29/2019   09:52:32   (   0.07,-128.03) (  -0.10,-127.27)   86.19                80
 05/01/2019   21:58:26   (  -0.07,-128.10) (  -0.04,-128.05)    5.73                80
 05/04/2019   10:01:31   (   0.06,-128.16) (   0.20,-128.80)   72.57                80
 05/05/2019   09:40:07   (   0.07,-128.18) (  -0.79,-124.27)  445.98                80
 05/06/2019   22:02:04   (  -0.05,-128.22) (  -0.39,-129.57)  155.60                80
 05/07/2019   21:46:00   (  -0.06,-128.23) (   0.66,-125.05)  362.72                80