Simultaneous Nadir Overpasses (SNOs) between NOAA-21 and TERRA
TLE Epoch: 2023 12 18.  Predictions up to the next  14.0 days:

     Date     Time(NOAA-21) NOAA-21 Lat/Lon Date Time(TERRA) TERRA Lat/Lon    Distance(km)  Time Diff(sec)
 12/19/2023   16:53:30   ( -71.51, 100.27) 12/19/2023   16:54:41  ( -71.47, 100.50)    9.22                71
 12/19/2023   17:44:12   (  71.30, -92.05) 12/19/2023   17:44:05  (  71.31, -92.09)    2.10                 7
 12/19/2023   18:34:46   ( -70.79,  76.14) 12/19/2023   18:33:36  ( -70.84,  74.83)   48.03                70
 12/22/2023   04:56:49   (  71.88,  98.79) 12/22/2023   04:57:58  (  71.80, 100.16)   48.56                69
 12/22/2023   05:47:22   ( -71.32, -92.88) 12/22/2023   05:47:29  ( -71.33, -92.95)    2.61                 7
 12/22/2023   06:38:05   (  71.16,  74.71) 12/22/2023   06:36:52  (  71.22,  74.54)    8.53                73
 12/24/2023   17:50:34   (  71.34, -93.71) 12/24/2023   17:50:51  (  71.35, -93.79)    2.68                17
 12/24/2023   18:41:16   ( -71.25,  73.78) 12/24/2023   18:40:15  ( -71.26,  73.73)    2.40                61
 12/27/2023   05:53:44   ( -71.38, -94.56) 12/27/2023   05:54:14  ( -71.36, -94.64)    3.17                30
 12/27/2023   06:44:28   (  71.28,  72.92) 12/27/2023   06:43:36  (  71.30,  72.93)    2.96                52
 12/29/2023   17:56:56   (  71.42, -95.43) 12/29/2023   17:57:34  (  71.43, -95.41)    1.12                38
 12/29/2023   18:47:38   ( -71.32,  72.06) 12/29/2023   18:46:59  ( -71.29,  72.04)    3.27                39