Simultaneous Nadir Overpasses (SNOs) between NOAA-19 and NPP
TLE Epoch: 2017 12 30.  Predictions up to the next  14.0 days:

     Date     Time(NOAA-19) NOAA-19 Lat/Lon Date Time(NPP) NPP Lat/Lon    Distance(km)  Time Diff(sec)
 01/11/2018   01:18:17   ( -80.69, -67.08) 01/11/2018   01:19:29  ( -80.69, -67.15)    1.42                72
 01/11/2018   02:09:14   (  80.68, 100.01) 01/11/2018   02:10:14  (  80.69, 100.13)    2.30                60
 01/11/2018   03:00:18   ( -80.69, -92.46) 01/11/2018   03:00:59  ( -80.69, -92.58)    2.17                41
 01/11/2018   03:51:15   (  80.69,  74.62) 01/11/2018   03:51:44  (  80.69,  74.71)    1.62                29
 01/11/2018   04:42:19   ( -80.70,-117.84) 01/11/2018   04:42:29  ( -80.69,-118.00)    2.93                10
 01/11/2018   05:33:16   (  80.69,  49.24) 01/11/2018   05:33:14  (  80.69,  49.28)    0.96                 2
 01/11/2018   06:24:21   ( -80.69,-143.57) 01/11/2018   06:23:59  ( -80.70,-143.42)    2.88                22
 01/11/2018   07:15:16   (  80.69,  23.85) 01/11/2018   07:14:43  (  80.70,  23.86)    0.42                33
 01/11/2018   08:06:21   ( -80.69,-168.96) 01/11/2018   08:05:28  ( -80.70,-168.84)    2.12                53