Simultaneous Nadir Overpasses (SNOs) between GOES-15 and NPP
TLE Epoch: 2021 5 23.  Predictions up to the next  14.0 days:

     Date     Time(GOES-15)   GOES-15 Lat/Lon  NPP Lat/Lon    Distance(km)  Time Diff(sec)
 05/25/2021   10:01:17   (   0.07,-128.39) (   0.14,-128.78)   44.09                80
 05/26/2021   09:39:53   (   0.07,-128.41) (  -0.84,-124.25)  473.38                80
 05/27/2021   22:01:50   (  -0.07,-128.36) (  -0.36,-129.55)  136.73                80
 05/28/2021   21:45:46   (  -0.07,-128.37) (   0.68,-125.03)  381.00                80
 05/30/2021   10:07:36   (   0.07,-128.46) (   0.47,-130.31)  210.03                80
 05/31/2021   09:46:11   (   0.07,-128.47) (  -0.51,-125.77)  307.10                80
 06/01/2021   22:08:08   (  -0.07,-128.41) (  -0.68,-131.08)  304.20                80
 06/02/2021   21:52:05   (  -0.08,-128.42) (   0.36,-126.55)  213.48                80
 06/04/2021   10:13:54   (   0.07,-128.52) (   0.79,-131.83)  376.84                80
 06/05/2021   09:52:30   (   0.08,-128.53) (  -0.19,-127.30)  140.19                80