Simultaneous Nadir Overpasses (SNOs) between GOES-15 and NPP
TLE Epoch: 2020 4 18.  Predictions up to the next  14.0 days:

     Date     Time(GOES-15)   GOES-15 Lat/Lon  NPP Lat/Lon    Distance(km)  Time Diff(sec)
 04/20/2020   10:01:29   (  -0.18,-128.03) (   0.01,-128.86)   95.15                80
 04/21/2020   09:40:05   (  -0.19,-128.05) (  -1.02,-124.33)  423.38                80
 04/22/2020   22:04:41   (   0.16,-128.09) (  -0.18,-129.64)  176.62                80
 04/23/2020   21:43:17   (   0.18,-128.11) (   0.84,-125.11)  341.99                80
 04/25/2020   10:07:44   (  -0.15,-128.14) (   0.35,-130.37)  254.10                80
 04/26/2020   09:46:19   (  -0.17,-128.16) (  -0.67,-125.84)  263.64                80
 04/27/2020   22:10:56   (   0.14,-128.17) (  -0.52,-131.14)  338.27                80
 04/28/2020   21:49:31   (   0.16,-128.19) (   0.50,-126.61)  179.43                80
 04/30/2020   10:13:58   (  -0.12,-128.22) (   0.70,-131.88)  417.43                80
 05/01/2020   09:52:34   (  -0.14,-128.22) (  -0.33,-127.35)   99.54                80