Simultaneous Nadir Overpasses (SNOs) between NOAA-15 and METOP-C
TLE Epoch: 2021 4 8.  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   21:12:21   ( -80.86,  81.78) 04/20/2021   21:11:20  ( -80.86,  76.13)   99.69                61
 04/20/2021   22:03:00   (  81.00,-113.66) 04/20/2021   22:01:53  (  81.01,-113.54)    2.42                67
 04/20/2021   22:53:31   ( -80.99,  53.74) 04/20/2021   22:52:33  ( -81.01,  53.88)    3.02                58
 04/20/2021   23:44:03   (  81.01,-139.19) 04/20/2021   23:43:15  (  81.00,-139.03)    2.90                48
 04/21/2021   00:34:34   ( -81.01,  28.22) 04/21/2021   00:33:55  ( -81.00,  28.39)    2.95                39
 04/21/2021   01:25:05   (  81.00,-164.35) 04/21/2021   01:24:37  (  80.99,-164.52)    3.26                28
 04/21/2021   02:15:36   ( -81.00,   3.07) 04/21/2021   02:15:17  ( -81.00,   2.90)    2.95                19
 04/21/2021   03:06:07   (  81.00, 170.49) 04/21/2021   03:05:58  (  81.00, 170.35)    2.47                 9
 04/21/2021   03:56:38   ( -81.00, -22.09) 04/21/2021   03:56:38  ( -81.01, -22.22)    2.65                 0
 04/21/2021   04:47:10   (  81.01, 144.96) 04/21/2021   04:47:20  (  81.00, 144.86)    2.50                10
 04/21/2021   05:37:41   ( -81.01, -47.61) 04/21/2021   05:38:00  ( -81.00, -47.71)    2.12                19
 04/21/2021   06:28:12   (  81.01, 119.80) 04/21/2021   06:28:41  (  81.01, 119.73)    1.24                29
 04/21/2021   07:18:43   ( -81.00, -72.76) 04/21/2021   07:19:21  ( -81.01, -72.84)    1.53                38
 04/21/2021   08:09:14   (  81.00,  94.64) 04/21/2021   08:10:02  (  81.02,  94.61)    1.49                48
 04/21/2021   08:59:46   ( -81.02, -98.28) 04/21/2021   09:00:43  ( -81.00, -98.33)    1.65                57
 04/21/2021   09:50:17   (  81.01,  69.12) 04/21/2021   09:51:24  (  81.01,  69.12)    0.70                67