Simultaneous Nadir Overpasses (SNOs) between GOES-15 and NPP
TLE Epoch: 2020 12 3.  Predictions up to the next  14.0 days:

     Date     Time(GOES-15)   GOES-15 Lat/Lon  NPP Lat/Lon    Distance(km)  Time Diff(sec)
 12/03/2020   21:43:06   (   0.02,-128.00) (   0.70,-125.01)  340.40                80
 12/05/2020   10:07:32   (   0.01,-128.02) (   0.54,-130.26)  255.88                80
 12/06/2020   09:46:07   (  -0.01,-128.04) (  -0.53,-125.74)  262.47                80
 12/07/2020   22:10:41   (  -0.03,-128.08) (  -0.72,-131.03)  337.25                80
 12/08/2020   21:49:17   (  -0.00,-128.09) (   0.36,-126.51)  180.67                80
 12/10/2020   10:13:42   (   0.04,-128.11) (   0.88,-131.76)  416.54                80
 12/11/2020   09:52:18   (   0.02,-128.13) (  -0.19,-127.24)  101.33                80
 12/12/2020   22:16:52   (  -0.06,-128.16) (  -1.05,-132.53)  498.86                80
 12/13/2020   21:55:27   (  -0.04,-128.16) (  -0.03,-128.00)   18.55                80
 12/16/2020   10:01:07   (   0.07,-128.18) (   0.20,-128.73)   63.21                80