Simultaneous Nadir Overpasses (SNOs) between GOES-15 and NPP
TLE Epoch: 2021 3 24.  Predictions up to the next  14.0 days:

     Date     Time(GOES-15)   GOES-15 Lat/Lon  NPP Lat/Lon    Distance(km)  Time Diff(sec)
 03/24/2021   22:01:46   (   0.07,-128.39) (  -0.21,-129.59)  136.95                80
 03/25/2021   21:45:41   (   0.08,-128.39) (   0.83,-125.07)  378.95                80
 03/27/2021   10:07:28   (  -0.06,-128.36) (   0.40,-130.32)  223.93                80
 03/28/2021   09:46:03   (  -0.07,-128.35) (  -0.64,-125.80)  291.00                80
 03/29/2021   22:07:59   (   0.06,-128.34) (  -0.57,-131.09)  313.63                80
 03/30/2021   21:51:54   (   0.07,-128.33) (   0.47,-126.56)  201.65                80
 04/01/2021   10:13:40   (  -0.06,-128.30) (   0.76,-131.82)  401.20                80
 04/02/2021   09:52:16   (  -0.06,-128.28) (  -0.29,-127.29)  112.90                80
 04/03/2021   22:14:11   (   0.05,-128.25) (  -0.92,-132.59)  494.09                80
 04/04/2021   21:58:06   (   0.05,-128.24) (   0.06,-128.05)   20.72                80