Simultaneous Nadir Overpasses (SNOs) between GOES-15 and NPP
TLE Epoch: 2019 7 23.  Predictions up to the next  14.0 days:

     Date     Time(GOES-15)   GOES-15 Lat/Lon  NPP Lat/Lon    Distance(km)  Time Diff(sec)
 07/23/2019   09:59:26   (  -0.21,-128.06) (  -0.04,-128.92)   97.65                80
 07/24/2019   09:43:22   (  -0.20,-128.08) (  -1.05,-124.39)  421.90                80
 07/25/2019   22:02:39   (   0.23,-128.10) (  -0.11,-129.70)  181.79                80
 07/26/2019   21:46:35   (   0.22,-128.12) (   0.90,-125.16)  337.50                80
 07/28/2019   10:05:43   (  -0.24,-128.18) (   0.25,-130.44)  257.03                80
 07/29/2019   09:49:39   (  -0.24,-128.20) (  -0.76,-125.91)  261.49                80
 07/30/2019   22:08:56   (   0.26,-128.19) (  -0.39,-131.22)  344.13                80
 07/31/2019   21:52:51   (   0.25,-128.21) (   0.62,-126.69)  174.24                80
 08/02/2019   10:12:00   (  -0.28,-128.26) (   0.53,-131.96)  421.02                80
 08/03/2019   09:55:55   (  -0.27,-128.28) (  -0.48,-127.43)   97.03                80
 08/05/2019   21:59:07   (   0.28,-128.27) (   0.29,-128.20)    8.64                80