Simultaneous Nadir Overpasses (SNOs) between GOES-15 and NPP
TLE Epoch: 2020 1 13.  Predictions up to the next  14.0 days:

     Date     Time(GOES-15)   GOES-15 Lat/Lon  NPP Lat/Lon    Distance(km)  Time Diff(sec)
 01/15/2020   09:58:33   (  -0.05,-128.43) (   0.03,-128.78)   39.23                80
 01/16/2020   09:42:28   (  -0.05,-128.44) (  -0.98,-124.24)  477.95                80
 01/17/2020   22:01:43   (   0.05,-128.43) (  -0.19,-129.55)  127.21                80
 01/18/2020   21:45:38   (   0.04,-128.43) (   0.82,-125.01)  389.69                80
 01/20/2020   10:04:44   (  -0.04,-128.44) (   0.37,-130.27)  209.24                80
 01/21/2020   09:48:38   (  -0.04,-128.44) (  -0.64,-125.74)  307.45                80
 01/22/2020   22:07:54   (   0.04,-128.42) (  -0.52,-131.04)  298.30                80
 01/23/2020   21:51:47   (   0.03,-128.42) (   0.44,-126.50)  218.08                80
 01/25/2020   10:10:55   (  -0.03,-128.42) (   0.70,-131.77)  381.82                80
 01/26/2020   09:54:49   (  -0.03,-128.41) (  -0.31,-127.24)  134.45                80