Simultaneous Nadir Overpasses (SNOs) between NOAA-15 and METOP-C
TLE Epoch: 2021 4 13.  Predictions up to the next  14.0 days:

     Date     Time(NOAA-15) NOAA-15 Lat/Lon Date Time(METOP-C) METOP-C Lat/Lon    Distance(km)  Time Diff(sec)
 04/20/2021   22:03:00   (  81.00,-113.76) 04/20/2021   22:01:53  (  81.00,-113.72)    0.81                67
 04/20/2021   22:53:31   ( -81.00,  53.61) 04/20/2021   22:52:33  ( -81.00,  53.67)    1.10                58
 04/20/2021   23:44:02   (  81.00,-138.92) 04/20/2021   23:43:14  (  81.01,-138.84)    1.93                48
 04/21/2021   00:34:33   ( -81.00,  28.45) 04/21/2021   00:33:54  ( -81.01,  28.55)    2.29                39
 04/21/2021   01:25:05   (  81.01,-164.45) 04/21/2021   01:24:36  (  81.00,-164.33)    2.10                29
 04/21/2021   02:15:36   ( -81.01,   2.93) 04/21/2021   02:15:16  ( -81.01,   3.05)    2.11                20
 04/21/2021   03:06:07   (  81.01, 170.39) 04/21/2021   03:05:57  (  81.01, 170.54)    2.69                10
 04/21/2021   03:56:38   ( -81.00, -22.22) 04/21/2021   03:56:37  ( -81.01, -22.07)    2.82                 1
 04/21/2021   04:47:09   (  81.00, 145.24) 04/21/2021   04:47:19  (  81.01, 145.05)    3.30                10
 04/21/2021   05:37:41   ( -81.02, -47.74) 04/21/2021   05:37:59  ( -81.01, -47.56)    3.17                18
 04/21/2021   06:28:12   (  81.01, 119.71) 04/21/2021   06:28:41  (  81.00, 119.56)    3.03                29
 04/21/2021   07:18:43   ( -81.01, -72.89) 04/21/2021   07:19:21  ( -81.00, -73.05)    3.00                38
 04/21/2021   08:09:14   (  81.01,  94.55) 04/21/2021   08:10:02  (  81.01,  94.43)    2.06                48
 04/21/2021   08:59:45   ( -81.01, -98.05) 04/21/2021   09:00:42  ( -81.01, -98.18)    2.37                57
 04/21/2021   09:50:16   (  81.00,  69.39) 04/21/2021   09:51:23  (  81.02,  69.30)    2.15                67