Simultaneous Nadir Overpasses (SNOs) between GOES-15 and NPP
TLE Epoch: 2020 6 25.  Predictions up to the next  14.0 days:

     Date     Time(GOES-15)   GOES-15 Lat/Lon  NPP Lat/Lon    Distance(km)  Time Diff(sec)
 06/25/2020   22:04:25   (  -0.03,-127.95) (  -0.39,-129.49)  175.61                80
 06/26/2020   21:43:02   (  -0.02,-127.98) (   0.65,-124.97)  343.76                80
 06/28/2020   10:07:31   (   0.03,-128.08) (   0.50,-130.24)  246.30                80
 06/29/2020   09:46:08   (   0.02,-128.11) (  -0.54,-125.72)  272.50                80
 06/30/2020   22:10:44   (  -0.03,-128.09) (  -0.71,-131.01)  333.88                80
 07/01/2020   21:49:21   (  -0.02,-128.11) (   0.34,-126.49)  184.77                80
 07/03/2020   10:13:50   (   0.03,-128.20) (   0.81,-131.77)  406.11                80
 07/04/2020   09:52:26   (   0.02,-128.22) (  -0.23,-127.25)  112.00                80
 07/05/2020   22:17:03   (  -0.02,-128.19) (  -1.01,-132.54)  495.78                80
 07/06/2020   21:55:39   (  -0.01,-128.21) (   0.04,-128.02)   22.45                80