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)
 12/02/2020   22:04:31   (   0.00,-127.97) (  -0.37,-129.53)  178.16                80
 12/03/2020   21:43:06   (   0.02,-128.00) (   0.70,-125.01)  340.24                80
 12/05/2020   10:07:33   (   0.01,-128.02) (   0.49,-130.28)  255.97                80
 12/06/2020   09:46:07   (  -0.01,-128.04) (  -0.52,-125.74)  262.35                80
 12/07/2020   22:10:41   (  -0.03,-128.08) (  -0.72,-131.03)  337.54                80
 12/08/2020   21:49:17   (  -0.00,-128.09) (   0.36,-126.51)  180.35                80
 12/10/2020   10:13:42   (   0.04,-128.11) (   0.88,-131.76)  416.80                80
 12/11/2020   09:52:18   (   0.02,-128.13) (  -0.19,-127.24)  101.05                80
 12/12/2020   22:16:52   (  -0.06,-128.15) (  -1.05,-132.53)  499.30                80
 12/13/2020   21:55:27   (  -0.04,-128.16) (  -0.03,-128.00)   18.01                80