Simultaneous Nadir Overpasses (SNOs) between GOES-15 and NPP
TLE Epoch: 2021 8 1.  Predictions up to the next  14.0 days:

     Date     Time(GOES-15)   GOES-15 Lat/Lon  NPP Lat/Lon    Distance(km)  Time Diff(sec)
 08/02/2021   10:05:45   (  -0.16,-127.97) (   0.40,-130.45)  282.97                80
 08/03/2021   09:49:40   (  -0.15,-127.99) (  -0.59,-125.92)  236.18                80
 08/04/2021   22:08:58   (   0.17,-127.93) (  -0.54,-131.24)  376.45                80
 08/05/2021   21:52:54   (   0.17,-127.95) (   0.44,-126.70)  142.24                80
 08/07/2021   10:12:03   (  -0.19,-128.08) (   0.69,-131.98)  444.76                80
 08/08/2021   09:56:00   (  -0.18,-128.10) (  -0.35,-127.46)   73.82                80
 08/10/2021   21:56:33   (   0.19,-128.04) (   0.15,-128.23)   21.17                80
 08/11/2021   21:40:28   (   0.18,-128.06) (   1.14,-123.69)  496.99                80
 08/13/2021   09:59:37   (  -0.20,-128.18) (  -0.01,-128.98)   90.93                80
 08/14/2021   09:43:34   (  -0.19,-128.19) (  -1.05,-124.45)  426.99                80