Simultaneous Nadir Overpasses (SNOs) between GOES-15 and NPP
TLE Epoch: 2020 3 16.  Predictions up to the next  14.0 days:

     Date     Time(GOES-15)   GOES-15 Lat/Lon  NPP Lat/Lon    Distance(km)  Time Diff(sec)
 03/16/2020   21:58:26   (   0.32,-128.30) (   0.34,-128.16)   16.20                80
 03/19/2020   10:01:29   (  -0.31,-128.22) (  -0.13,-128.89)   77.37                80
 03/20/2020   09:40:04   (  -0.31,-128.19) (  -1.14,-124.36)  436.43                80
 03/21/2020   22:02:02   (   0.30,-128.20) (  -0.01,-129.67)  167.75                80
 03/22/2020   21:45:57   (   0.30,-128.17) (   1.01,-125.14)  346.25                80
 03/24/2020   10:07:44   (  -0.29,-128.11) (   0.21,-130.40)  261.16                80
 03/25/2020   09:46:20   (  -0.30,-128.08) (  -0.81,-125.87)  252.21                80
 03/26/2020   22:10:56   (   0.28,-128.07) (  -0.40,-131.17)  353.07                80
 03/27/2020   21:52:12   (   0.29,-128.05) (   0.61,-126.64)  160.34                80
 03/29/2020   10:13:59   (  -0.27,-127.98) (   0.60,-131.91)  447.46                80
 03/30/2020   09:52:35   (  -0.28,-127.94) (  -0.42,-127.38)   65.06                80