Simultaneous Nadir Overpasses (SNOs) between GOES-15 and NPP
TLE Epoch: 2020 5 20.  Predictions up to the next  14.0 days:

     Date     Time(GOES-15)   GOES-15 Lat/Lon  NPP Lat/Lon    Distance(km)  Time Diff(sec)
 05/22/2020   10:01:24   (  -0.05,-128.27) (   0.10,-128.81)   62.79                80
 05/23/2020   09:40:00   (  -0.06,-128.25) (  -0.94,-124.28)  451.94                80
 05/24/2020   22:04:35   (   0.04,-128.22) (  -0.29,-129.57)  155.11                80
 05/25/2020   21:43:11   (   0.05,-128.21) (   0.74,-125.05)  359.62                80
 05/27/2020   10:07:38   (  -0.03,-128.19) (   0.45,-130.31)  241.68                80
 05/28/2020   09:46:14   (  -0.04,-128.17) (  -0.58,-125.78)  272.25                80
 05/29/2020   22:10:49   (   0.02,-128.12) (  -0.64,-131.07)  336.43                80
 05/30/2020   21:49:24   (   0.03,-128.10) (   0.39,-126.55)  177.78                80
 06/01/2020   10:13:52   (  -0.01,-128.09) (   0.80,-131.81)  423.65                80
 06/02/2020   09:52:26   (  -0.02,-128.06) (  -0.18,-127.27)   89.86                80