Simultaneous Nadir Overpasses (SNOs) between GOES-15 and NPP
TLE Epoch: 2020 5 13.  Predictions up to the next  14.0 days:

     Date     Time(GOES-15)   GOES-15 Lat/Lon  NPP Lat/Lon    Distance(km)  Time Diff(sec)
 05/13/2020   22:10:53   (   0.07,-128.30) (  -0.59,-131.11)  320.91                80
 05/14/2020   21:49:28   (   0.08,-128.30) (   0.44,-126.58)  195.42                80
 05/16/2020   10:13:56   (  -0.06,-128.30) (   0.75,-131.85)  403.85                80
 05/17/2020   09:52:31   (  -0.07,-128.30) (  -0.28,-127.32)  111.80                80
 05/18/2020   22:17:06   (   0.04,-128.28) (  -0.95,-132.61)  493.42                80
 05/19/2020   21:58:22   (   0.06,-128.28) (   0.08,-128.08)   22.57                80
 05/22/2020   10:01:25   (  -0.05,-128.27) (   0.07,-128.82)   61.87                80
 05/23/2020   09:40:00   (  -0.07,-128.26) (  -0.96,-124.29)  452.91                80
 05/24/2020   22:04:36   (   0.04,-128.23) (  -0.26,-129.58)  154.13                80
 05/25/2020   21:43:11   (   0.06,-128.22) (   0.77,-125.05)  360.72                80
 05/27/2020   10:07:38   (  -0.03,-128.21) (   0.42,-130.32)  240.12                80