Simultaneous Nadir Overpasses (SNOs) between NOAA-20 and NOAA-19
TLE Epoch: 2017 12 10.  Predictions up to the next  14.0 days:

     Date     Time(NOAA-20) NOAA-20 Lat/Lon Date Time(NOAA-19) NOAA-19 Lat/Lon    Distance(km)  Time Diff(sec)
 12/21/2017   02:51:56   (  80.71,  89.58) 12/21/2017   02:50:45  (  80.71,  89.70)    2.15                71
 12/21/2017   03:42:37   ( -80.72,-103.24) 12/21/2017   03:41:45  ( -80.71,-103.18)    1.93                52
 12/21/2017   04:33:16   (  80.71,  64.34) 12/21/2017   04:32:46  (  80.72,  64.32)    1.13                30
 12/21/2017   05:23:57   ( -80.71,-128.48) 12/21/2017   05:23:46  ( -80.71,-128.55)    1.40                11
 12/21/2017   06:14:37   (  80.72,  38.76) 12/21/2017   06:14:47  (  80.72,  38.94)    3.40                10
 12/21/2017   07:05:18   ( -80.73,-154.06) 12/21/2017   07:05:47  ( -80.71,-153.92)    2.95                29
 12/21/2017   07:55:57   (  80.71,  13.52) 12/21/2017   07:56:48  (  80.72,  13.57)    1.35                51