Simultaneous Nadir Overpasses (SNOs) between GOES-15 and NPP
TLE Epoch: 2020 6 20.  Predictions up to the next  14.0 days:

     Date     Time(GOES-15)   GOES-15 Lat/Lon  NPP Lat/Lon    Distance(km)  Time Diff(sec)
 06/20/2020   21:55:31   (  -0.02,-127.80) (  -0.04,-127.99)   21.33                80
 06/21/2020   21:36:46   (  -0.01,-127.83) (   0.95,-123.45)  498.88                80
 06/23/2020   10:01:14   (   0.02,-127.93) (   0.17,-128.73)   90.66                80
 06/24/2020   09:39:49   (   0.01,-127.95) (  -0.81,-124.19)  428.80                80
 06/25/2020   22:04:25   (  -0.02,-127.95) (  -0.34,-129.50)  175.81                80
 06/26/2020   21:43:00   (  -0.02,-127.98) (   0.64,-124.96)  343.81                80
 06/28/2020   10:07:27   (   0.03,-128.07) (   0.54,-130.22)  245.97                80
 06/29/2020   09:46:02   (   0.02,-128.09) (  -0.51,-125.69)  273.09                80
 06/30/2020   22:10:38   (  -0.03,-128.07) (  -0.70,-130.99)  332.77                80
 07/01/2020   21:49:13   (  -0.02,-128.10) (   0.34,-126.46)  186.13                80
 07/03/2020   10:13:41   (   0.02,-128.18) (   0.84,-131.73)  404.49                80
 07/04/2020   09:52:16   (   0.01,-128.20) (  -0.21,-127.20)  113.82                80