Simultaneous Nadir Overpasses (SNOs) between GOES-15 and NOAA-19
TLE Epoch: 2018 12 25.  Predictions up to the next  14.0 days:

     Date     Time(GOES-15)   GOES-15 Lat/Lon  NOAA-19 Lat/Lon    Distance(km)  Time Diff(sec)
 12/27/2018   01:15:45   (   0.14,-128.52) (  -0.40,-130.90)  271.73                80
 12/28/2018   01:01:29   (   0.13,-128.51) (   0.25,-128.07)   50.24                80
 12/29/2018   00:49:54   (   0.13,-128.50) (   0.91,-125.24)  372.10                80
 12/31/2018   13:10:59   (  -0.13,-128.58) (   0.24,-130.24)  189.99                80
 01/01/2019   13:02:04   (  -0.13,-128.57) (  -0.42,-127.42)  131.95                80
 01/02/2019   12:50:27   (  -0.12,-128.55) (  -1.03,-124.58)  453.76                80
 01/04/2019   01:23:25   (   0.13,-128.43) (  -0.82,-132.46)  460.53                80
 01/05/2019   01:11:49   (   0.12,-128.42) (  -0.17,-129.63)  139.26                80
 01/06/2019   00:57:34   (   0.12,-128.40) (   0.49,-126.80)  181.92                80
 01/08/2019   13:18:39   (  -0.11,-128.45) (   0.64,-131.80)  382.64                80