Simultaneous Nadir Overpasses (SNOs) between GOES-15 and NPP
TLE Epoch: 2021 3 25.  Predictions up to the next  14.0 days:

     Date     Time(GOES-15)   GOES-15 Lat/Lon  NPP Lat/Lon    Distance(km)  Time Diff(sec)
 03/27/2021   10:07:29   (  -0.06,-128.36) (   0.36,-130.33)  223.66                80
 03/28/2021   09:46:03   (  -0.07,-128.35) (  -0.63,-125.79)  291.37                80
 03/29/2021   22:07:59   (   0.06,-128.35) (  -0.53,-131.10)  312.80                80
 03/30/2021   21:51:54   (   0.07,-128.34) (   0.45,-126.56)  202.60                80
 04/01/2021   10:13:41   (  -0.05,-128.31) (   0.71,-131.83)  400.36                80
 04/02/2021   09:52:16   (  -0.06,-128.29) (  -0.27,-127.29)  113.85                80
 04/03/2021   22:14:11   (   0.05,-128.27) (  -0.94,-132.58)  492.74                80
 04/04/2021   21:58:07   (   0.05,-128.25) (   0.10,-128.06)   21.96                80
 04/07/2021   10:01:08   (  -0.04,-128.20) (   0.07,-128.79)   66.67                80
 04/08/2021   09:39:43   (  -0.05,-128.18) (  -0.91,-124.25)  447.25                80