Simultaneous Nadir Overpasses (SNOs) between GOES-15 and NPP
TLE Epoch: 2020 4 10.  Predictions up to the next  14.0 days:

     Date     Time(GOES-15)   GOES-15 Lat/Lon  NPP Lat/Lon    Distance(km)  Time Diff(sec)
 04/11/2020   22:10:56   (   0.21,-127.78) (  -0.53,-131.15)  383.22                80
 04/12/2020   21:49:31   (   0.22,-127.82) (   0.49,-126.62)  136.70                80
 04/14/2020   10:13:58   (  -0.20,-127.87) (   0.71,-131.88)  457.23                80
 04/15/2020   09:52:34   (  -0.21,-127.90) (  -0.31,-127.35)   62.11                80
 04/17/2020   21:58:26   (   0.19,-127.97) (   0.14,-128.12)   17.76                80
 04/20/2020   10:01:30   (  -0.18,-128.06) (  -0.02,-128.87)   92.11                80
 04/21/2020   09:40:05   (  -0.19,-128.08) (  -1.04,-124.34)  426.89                80
 04/22/2020   22:04:41   (   0.17,-128.12) (  -0.15,-129.64)  173.34                80
 04/23/2020   21:43:17   (   0.18,-128.15) (   0.88,-125.12)  345.75                80