Simultaneous Nadir Overpasses (SNOs) between GOES-15 and NPP
TLE Epoch: 2020 1 25.  Predictions up to the next  14.0 days:

     Date     Time(GOES-15)   GOES-15 Lat/Lon  NPP Lat/Lon    Distance(km)  Time Diff(sec)
 01/26/2020   09:54:54   (  -0.04,-128.35) (  -0.29,-127.25)  125.05                80
 01/27/2020   22:16:50   (   0.04,-128.32) (  -0.94,-132.55)  482.35                80
 01/28/2020   21:55:27   (   0.04,-128.30) (   0.12,-128.03)   31.65                80
 01/31/2020   09:58:30   (  -0.04,-128.24) (   0.08,-128.77)   59.78                80
 02/01/2020   09:42:26   (  -0.04,-128.22) (  -0.92,-124.24)  454.00                80
 02/02/2020   22:04:23   (   0.03,-128.19) (  -0.24,-129.55)  154.07                80
 02/03/2020   21:42:59   (   0.03,-128.16) (   0.75,-125.02)  359.16                80
 02/05/2020   10:04:47   (  -0.03,-128.11) (   0.44,-130.29)  247.69                80
 02/06/2020   09:48:43   (  -0.02,-128.08) (  -0.56,-125.75)  265.19                80
 02/07/2020   22:10:38   (  -0.02,-128.04) (  -0.72,-131.04)  343.08                80