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

     Date     Time(GOES-15)   GOES-15 Lat/Lon  NPP Lat/Lon    Distance(km)  Time Diff(sec)
 05/16/2020   10:13:56   (  -0.05,-128.30) (   0.73,-131.85)  404.04                80
 05/17/2020   09:52:31   (  -0.07,-128.30) (  -0.30,-127.32)  111.54                80
 05/18/2020   22:17:07   (   0.04,-128.28) (  -0.93,-132.61)  493.66                80
 05/19/2020   21:55:42   (   0.06,-128.28) (   0.10,-128.08)   22.13                80
 05/22/2020   10:01:25   (  -0.05,-128.27) (   0.06,-128.82)   62.61                80
 05/23/2020   09:40:01   (  -0.06,-128.25) (  -0.97,-124.29)  452.09                80
 05/24/2020   22:04:36   (   0.04,-128.22) (  -0.26,-129.58)  154.95                80
 05/25/2020   21:43:11   (   0.05,-128.21) (   0.78,-125.06)  359.80                80
 05/27/2020   10:07:39   (  -0.03,-128.20) (   0.42,-130.32)  241.36                80
 05/28/2020   09:46:13   (  -0.04,-128.17) (  -0.56,-125.78)  272.62                80