Simultaneous Nadir Overpasses (SNOs) between GOES-15 and NPP
TLE Epoch: 2021 8 22.  Predictions up to the next  14.0 days:

     Date     Time(GOES-15)   GOES-15 Lat/Lon  NPP Lat/Lon    Distance(km)  Time Diff(sec)
 08/23/2021   10:12:14   (  -0.26,-128.30) (   0.59,-132.02)  424.39                80
 08/24/2021   09:56:10   (  -0.26,-128.31) (  -0.46,-127.50)   93.03                80
 08/26/2021   21:59:23   (   0.27,-128.24) (   0.27,-128.27)    3.32                80
 08/29/2021   09:59:48   (  -0.27,-128.33) (  -0.14,-129.02)   77.58                80
 08/30/2021   09:43:44   (  -0.27,-128.34) (  -1.13,-124.48)  439.04                80
 08/31/2021   22:03:01   (   0.29,-128.25) (  -0.05,-129.79)  175.23                80
 09/01/2021   21:46:56   (   0.28,-128.25) (   0.94,-125.26)  340.72                80
 09/03/2021   10:06:06   (  -0.30,-128.32) (   0.19,-130.54)  252.24                80
 09/04/2021   09:50:01   (  -0.30,-128.32) (  -0.81,-126.00)  263.66                80