Simultaneous Nadir Overpasses (SNOs) between GOES-15 and NPP
TLE Epoch: 2018 10 23.  Predictions up to the next  14.0 days:

     Date     Time(GOES-15)   GOES-15 Lat/Lon  NPP Lat/Lon    Distance(km)  Time Diff(sec)
 10/24/2018   22:40:34   (  -0.19,-135.35) (  -0.99,-138.98)  412.97                80
 10/25/2018   22:24:29   (  -0.20,-135.33) (  -0.02,-134.44)  101.01                80
 10/27/2018   10:43:37   (   0.18,-135.34) (   1.14,-139.72)  498.85                80
 10/28/2018   10:27:32   (   0.19,-135.31) (   0.17,-135.18)   13.95                80
 10/30/2018   22:28:02   (  -0.18,-135.15) (  -0.36,-135.96)   91.42                80
 10/31/2018   22:11:57   (  -0.19,-135.12) (   0.62,-131.42)  421.25                80
 11/02/2018   10:31:05   (   0.16,-135.12) (   0.50,-136.70)  179.80                80
 11/03/2018   10:15:00   (   0.17,-135.08) (  -0.48,-132.16)  332.25                80
 11/04/2018   22:34:16   (  -0.14,-134.95) (  -0.69,-137.47)  287.36                80
 11/05/2018   22:18:11   (  -0.15,-134.91) (   0.29,-132.94)  225.05                80