Simultaneous Nadir Overpasses (SNOs) between GOES-15 and NPP
TLE Epoch: 2020 6 30.  Predictions up to the next  14.0 days:

     Date     Time(GOES-15)   GOES-15 Lat/Lon  NPP Lat/Lon    Distance(km)  Time Diff(sec)
 06/30/2020   22:10:44   (  -0.03,-128.09) (  -0.69,-131.02)  333.35                80
 07/01/2020   21:49:21   (  -0.02,-128.12) (   0.35,-126.49)  185.44                80
 07/03/2020   10:13:50   (   0.03,-128.21) (   0.80,-131.77)  405.25                80
 07/04/2020   09:52:26   (   0.02,-128.23) (  -0.19,-127.24)  112.91                80
 07/05/2020   22:17:03   (  -0.02,-128.20) (  -1.00,-132.54)  494.78                80
 07/06/2020   21:55:39   (  -0.02,-128.22) (   0.05,-128.02)   23.66                80
 07/09/2020   10:01:24   (   0.02,-128.33) (   0.11,-128.76)   48.92                80
 07/10/2020   09:40:01   (   0.02,-128.35) (  -0.94,-124.24)  469.17                80
 07/11/2020   22:01:57   (  -0.02,-128.32) (  -0.30,-129.54)  138.90                80
 07/12/2020   21:45:54   (  -0.02,-128.34) (   0.74,-125.01)  379.25                80