Simultaneous Nadir Overpasses (SNOs) between GOES-15 and NPP
TLE Epoch: 2020 1 27.  Predictions up to the next  14.0 days:

     Date     Time(GOES-15)   GOES-15 Lat/Lon  NPP Lat/Lon    Distance(km)  Time Diff(sec)
 01/27/2020   22:16:50   (   0.04,-128.32) (  -0.93,-132.55)  482.46                80
 01/28/2020   21:55:27   (   0.04,-128.30) (   0.12,-128.03)   31.50                80
 01/31/2020   09:58:30   (  -0.04,-128.24) (   0.07,-128.77)   60.02                80
 02/01/2020   09:42:26   (  -0.04,-128.22) (  -0.92,-124.24)  453.69                80
 02/02/2020   22:04:23   (   0.03,-128.19) (  -0.24,-129.55)  154.58                80
 02/03/2020   21:42:59   (   0.03,-128.16) (   0.76,-125.02)  358.62                80
 02/05/2020   10:04:47   (  -0.03,-128.10) (   0.43,-130.29)  248.24                80
 02/06/2020   09:48:43   (  -0.02,-128.07) (  -0.56,-125.75)  264.59                80
 02/07/2020   22:10:38   (  -0.02,-128.03) (  -0.71,-131.04)  343.87                80
 02/08/2020   21:49:13   (  -0.01,-127.99) (   0.29,-126.51)  168.28                80
 02/10/2020   10:11:02   (   0.01,-127.92) (   0.90,-131.78)  440.14                80