Simultaneous Nadir Overpasses (SNOs) between GOES-15 and NPP
TLE Epoch: 2020 5 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)
 05/18/2020   22:17:07   (   0.04,-128.28) (  -0.92,-132.61)  493.59                80
 05/19/2020   21:55:42   (   0.06,-128.28) (   0.11,-128.09)   22.18                80
 05/22/2020   10:01:24   (  -0.05,-128.26) (   0.10,-128.81)   62.87                80
 05/23/2020   09:40:00   (  -0.06,-128.25) (  -0.93,-124.28)  451.87                80
 05/24/2020   22:04:36   (   0.04,-128.22) (  -0.24,-129.59)  155.18                80
 05/25/2020   21:43:11   (   0.05,-128.21) (   0.74,-125.05)  359.55                80
 05/27/2020   10:07:38   (  -0.03,-128.19) (   0.45,-130.31)  241.75                80
 05/28/2020   09:46:14   (  -0.04,-128.17) (  -0.58,-125.78)  272.18                80
 05/29/2020   22:10:49   (   0.02,-128.12) (  -0.64,-131.08)  336.51                80
 05/30/2020   21:49:24   (   0.03,-128.10) (   0.40,-126.55)  177.70                80
 06/01/2020   10:13:52   (  -0.01,-128.09) (   0.80,-131.81)  423.72                80