Simultaneous Nadir Overpasses (SNOs) between GOES-15 and NPP
TLE Epoch: 2021 6 2.  Predictions up to the next  14.0 days:

     Date     Time(GOES-15)   GOES-15 Lat/Lon  NPP Lat/Lon    Distance(km)  Time Diff(sec)
 06/02/2021   21:52:05   (  -0.07,-128.42) (   0.34,-126.55)  213.24                80
 06/04/2021   10:13:54   (   0.06,-128.50) (   0.80,-131.83)  378.62                80
 06/05/2021   09:52:30   (   0.07,-128.51) (  -0.18,-127.29)  138.19                80
 06/06/2021   22:14:27   (  -0.06,-128.44) (  -1.01,-132.60)  473.79                80
 06/07/2021   21:58:23   (  -0.06,-128.45) (   0.04,-128.08)   43.14                80
 06/10/2021   10:01:28   (   0.06,-128.53) (   0.13,-128.82)   33.01                80
 06/11/2021   09:40:05   (   0.06,-128.53) (  -0.92,-124.30)  482.86                80
 06/12/2021   22:02:01   (  -0.05,-128.44) (  -0.32,-129.59)  130.90                80
 06/13/2021   21:45:58   (  -0.06,-128.44) (   0.73,-125.07)  385.16                80
 06/15/2021   10:07:46   (   0.05,-128.51) (   0.48,-130.33)  208.01                80