Simultaneous Nadir Overpasses (SNOs) between GOES-15 and NPP
TLE Epoch: 2020 6 21.  Predictions up to the next  14.0 days:

     Date     Time(GOES-15)   GOES-15 Lat/Lon  NPP Lat/Lon    Distance(km)  Time Diff(sec)
 06/23/2020   10:01:14   (   0.02,-127.93) (   0.21,-128.72)   90.50                80
 06/24/2020   09:39:49   (   0.01,-127.96) (  -0.84,-124.19)  428.96                80
 06/25/2020   22:04:24   (  -0.02,-127.95) (  -0.38,-129.49)  175.56                80
 06/26/2020   21:43:00   (  -0.02,-127.98) (   0.67,-124.96)  344.07                80
 06/28/2020   10:07:27   (   0.03,-128.07) (   0.51,-130.23)  245.60                80
 06/29/2020   09:46:03   (   0.02,-128.10) (  -0.53,-125.70)  273.49                80
 06/30/2020   22:10:38   (  -0.03,-128.08) (  -0.68,-130.99)  332.34                80
 07/01/2020   21:49:14   (  -0.02,-128.10) (   0.37,-126.47)  186.61                80
 07/03/2020   10:13:41   (   0.02,-128.19) (   0.81,-131.73)  403.94                80
 07/04/2020   09:52:17   (   0.02,-128.21) (  -0.23,-127.21)  114.44                80