Simultaneous Nadir Overpasses (SNOs) between GOES-15 and NPP
TLE Epoch: 2021 5 30.  Predictions up to the next  14.0 days:

     Date     Time(GOES-15)   GOES-15 Lat/Lon  NPP Lat/Lon    Distance(km)  Time Diff(sec)
 05/30/2021   10:07:36   (   0.06,-128.46) (   0.47,-130.31)  210.59                80
 05/31/2021   09:46:11   (   0.07,-128.46) (  -0.51,-125.77)  306.47                80
 06/01/2021   22:08:08   (  -0.07,-128.41) (  -0.68,-131.08)  304.11                80
 06/02/2021   21:52:05   (  -0.07,-128.42) (   0.36,-126.55)  213.54                80
 06/04/2021   10:13:54   (   0.07,-128.51) (   0.79,-131.83)  377.72                80
 06/05/2021   09:52:30   (   0.07,-128.52) (  -0.20,-127.30)  139.23                80
 06/06/2021   22:14:27   (  -0.06,-128.45) (  -0.99,-132.60)  472.77                80
 06/07/2021   21:58:23   (  -0.07,-128.46) (  -0.01,-128.07)   44.40                80
 06/10/2021   10:01:29   (   0.06,-128.55) (   0.11,-128.82)   31.05                80
 06/11/2021   09:40:04   (   0.06,-128.55) (  -0.87,-124.29)  484.97                80
 06/12/2021   22:02:01   (  -0.05,-128.46) (  -0.30,-129.59)  128.85                80