Simultaneous Nadir Overpasses (SNOs) between GOES-15 and NPP
TLE Epoch: 2021 7 30.  Predictions up to the next  14.0 days:

     Date     Time(GOES-15)   GOES-15 Lat/Lon  NPP Lat/Lon    Distance(km)  Time Diff(sec)
 07/30/2021   22:02:39   (   0.14,-127.80) (  -0.28,-129.70)  217.02                80
 07/31/2021   21:46:35   (   0.13,-127.82) (   0.71,-125.17)  302.59                80
 08/02/2021   10:05:45   (  -0.16,-127.97) (   0.38,-130.46)  282.68                80
 08/03/2021   09:49:40   (  -0.15,-128.00) (  -0.61,-125.92)  236.53                80
 08/04/2021   22:08:58   (   0.17,-127.93) (  -0.58,-131.23)  376.34                80
 08/05/2021   21:52:54   (   0.17,-127.95) (   0.47,-126.71)  142.44                80
 08/07/2021   10:12:04   (  -0.19,-128.09) (   0.67,-131.99)  444.11                80
 08/08/2021   09:55:59   (  -0.18,-128.11) (  -0.32,-127.45)   74.47                80
 08/10/2021   21:56:32   (   0.19,-128.05) (   0.12,-128.22)   20.86                80
 08/11/2021   21:40:28   (   0.18,-128.06) (   1.17,-123.70)  497.59                80