Simultaneous Nadir Overpasses (SNOs) between NOAA-15 and METOP-C
TLE Epoch: 2021 4 17.  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,-113.68) 04/20/2021   22:01:53  (  81.01,-113.62)    1.25                67
 04/20/2021   22:53:31   ( -81.00,  53.65) 04/20/2021   22:52:33  ( -81.01,  53.73)    1.48                58
 04/20/2021   23:44:03   (  81.01,-139.21) 04/20/2021   23:43:15  (  81.00,-139.11)    2.18                48
 04/21/2021   00:34:34   ( -81.01,  28.13) 04/21/2021   00:33:55  ( -81.00,  28.24)    2.33                39
 04/21/2021   01:25:05   (  81.01,-164.37) 04/21/2021   01:24:36  (  81.01,-164.24)    2.26                29
 04/21/2021   02:15:36   ( -81.01,   2.98) 04/21/2021   02:15:16  ( -81.01,   3.11)    2.34                20
 04/21/2021   03:06:07   (  81.00, 170.47) 04/21/2021   03:05:57  (  81.02, 170.63)    3.30                10
 04/21/2021   03:56:38   ( -81.00, -22.17) 04/21/2021   03:56:37  ( -81.02, -22.01)    3.31                 1
 04/21/2021   04:47:09   (  81.00, 145.31) 04/21/2021   04:47:19  (  81.01, 145.14)    3.29                10
 04/21/2021   05:37:41   ( -81.01, -47.69) 04/21/2021   05:37:59  ( -81.01, -47.50)    3.34                18
 04/21/2021   06:28:12   (  81.01, 119.78) 04/21/2021   06:28:41  (  81.00, 119.65)    2.43                29
 04/21/2021   07:18:43   ( -81.01, -72.85) 04/21/2021   07:19:21  ( -81.00, -72.99)    2.59                38
 04/21/2021   08:09:14   (  81.01,  94.63) 04/21/2021   08:10:02  (  81.01,  94.52)    1.97                48
 04/21/2021   08:59:45   ( -81.01, -98.00) 04/21/2021   09:00:42  ( -81.01, -98.12)    2.28                57
 04/21/2021   09:50:17   (  81.02,  69.10) 04/21/2021   09:51:24  (  81.01,  69.03)    1.63                67