Simultaneous Nadir Overpasses (SNOs) between GOES-15 and NPP
TLE Epoch: 2020 12 1.  Predictions up to the next  14.0 days:

     Date     Time(GOES-15)   GOES-15 Lat/Lon  NPP Lat/Lon    Distance(km)  Time Diff(sec)
 12/01/2020   09:39:56   (  -0.04,-127.94) (  -0.86,-124.24)  421.23                80
 12/02/2020   22:04:31   (   0.00,-127.97) (  -0.33,-129.54)  178.28                80
 12/03/2020   21:43:06   (   0.02,-127.99) (   0.68,-125.01)  340.08                80
 12/05/2020   10:07:32   (   0.01,-128.02) (   0.50,-130.27)  256.04                80
 12/06/2020   09:46:07   (  -0.01,-128.04) (  -0.51,-125.74)  262.25                80
 12/07/2020   22:10:42   (  -0.03,-128.07) (  -0.68,-131.04)  337.81                80
 12/08/2020   21:49:17   (  -0.00,-128.09) (   0.34,-126.51)  180.04                80
 12/10/2020   10:13:43   (   0.04,-128.11) (   0.85,-131.77)  417.05                80
 12/11/2020   09:52:17   (   0.02,-128.12) (  -0.17,-127.24)  100.75                80
 12/12/2020   22:16:52   (  -0.06,-128.15) (  -1.07,-132.53)  499.76                80
 12/13/2020   21:55:27   (  -0.04,-128.16) (   0.00,-128.01)   17.45                80