Simultaneous Nadir Overpasses (SNOs) between GOES-15 and NPP
TLE Epoch: 2018 10 30.  Predictions up to the next  14.0 days:

     Date     Time(GOES-15)   GOES-15 Lat/Lon  NPP Lat/Lon    Distance(km)  Time Diff(sec)
 10/30/2018   22:28:00   (  -0.17,-134.40) (  -0.52,-135.92)  173.74                80
 10/31/2018   22:11:53   (  -0.18,-133.57) (   0.32,-131.35)  253.02                80
 11/02/2018   10:30:56   (   0.15,-132.19) (   1.13,-136.57)  499.05                80
 11/03/2018   10:12:09   (   0.16,-131.37) (   0.29,-132.00)   71.23                80
 11/04/2018   09:56:01   (   0.17,-130.55) (  -0.55,-127.43)  356.26                80
 11/05/2018   22:15:14   (  -0.13,-129.43) (  -0.89,-132.68)  371.80                80
 11/06/2018   21:59:06   (  -0.15,-128.60) (  -0.05,-128.12)   54.74                80
 11/07/2018   21:40:19   (  -0.16,-127.77) (   0.79,-123.55)  481.21                80
 11/09/2018   09:59:22   (   0.13,-126.36) (   0.65,-128.76)  273.24                80
 11/10/2018   09:43:15   (   0.14,-125.54) (  -0.19,-124.19)  153.66                80
 11/12/2018   21:43:39   (  -0.12,-123.59) (  -0.40,-124.88)  146.86                80