Simultaneous Nadir Overpasses (SNOs) between GOES-15 and NPP
TLE Epoch: 2020 6 17.  Predictions up to the next  14.0 days:

     Date     Time(GOES-15)   GOES-15 Lat/Lon  NPP Lat/Lon    Distance(km)  Time Diff(sec)
 06/17/2020   10:13:45   (   0.03,-127.72) (   0.92,-131.75)  458.43                80
 06/18/2020   09:52:20   (   0.01,-127.77) (  -0.12,-127.22)   62.70                80
 06/20/2020   21:58:11   (  -0.02,-127.83) (  -0.05,-127.99)   17.90                80
 06/23/2020   10:01:14   (   0.02,-127.98) (   0.19,-128.72)   85.48                80
 06/24/2020   09:39:49   (   0.01,-128.01) (  -0.85,-124.20)  434.73                80
 06/25/2020   22:04:25   (  -0.02,-128.02) (  -0.36,-129.49)  168.43                80
 06/26/2020   21:43:00   (  -0.02,-128.05) (   0.68,-124.97)  351.98                80
 06/28/2020   10:07:28   (   0.03,-128.16) (   0.50,-130.23)  236.70                80
 06/29/2020   09:46:03   (   0.02,-128.19) (  -0.54,-125.70)  283.13                80
 06/30/2020   22:10:38   (  -0.03,-128.18) (  -0.67,-131.00)  321.35                80