Simultaneous Nadir Overpasses (SNOs) between NOAA-21 and TERRA
TLE Epoch: 2023 9 12.  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)
 09/12/2023   16:40:08   (  71.88, -76.96) 09/12/2023   16:41:14  (  71.74, -74.49)   87.21                66
 09/12/2023   17:30:34   ( -70.97,  91.97) 09/12/2023   17:30:51  ( -70.97,  91.94)    1.31                17
 09/12/2023   18:21:19   (  70.89,-100.61) 09/12/2023   18:20:14  (  70.88,-100.55)    2.76                65
 09/15/2023   05:33:48   (  71.05,  91.02) 09/15/2023   05:34:40  (  71.05,  91.06)    1.45                52
 09/15/2023   06:24:29   ( -70.91,-101.43) 09/15/2023   06:24:05  ( -70.94,-101.45)    2.66                24
 09/17/2023   17:37:12   ( -71.80,  88.91) 09/17/2023   17:38:19  ( -71.73,  91.17)   79.08                67
 09/17/2023   18:27:42   (  70.96,-102.30) 09/17/2023   18:27:54  (  70.97,-102.38)    3.47                12
 09/17/2023   19:18:24   ( -70.87,  65.16) 09/17/2023   19:17:19  ( -70.87,  65.12)    1.46                65
 09/20/2023   06:30:53   ( -71.04,-103.23) 09/20/2023   06:31:44  ( -71.04,-103.26)    1.52                51
 09/20/2023   07:21:37   (  70.92,  64.27) 09/20/2023   07:21:07  (  70.93,  64.22)    1.92                30
 09/22/2023   18:34:15   (  71.57,-104.96) 09/22/2023   18:35:25  (  71.45,-103.61)   49.49                70
 09/22/2023   19:24:48   ( -71.01,  63.34) 09/22/2023   19:24:57  ( -70.98,  63.31)    3.27                 9
 09/22/2023   20:15:32   (  70.89,-129.17) 09/22/2023   20:14:19  (  70.91,-129.14)    1.80                73
 09/25/2023   07:28:00   (  71.08,  62.41) 09/25/2023   07:28:42  (  71.07,  62.47)    2.51                42
 09/25/2023   08:18:41   ( -70.93,-130.02) 09/25/2023   08:18:08  ( -70.94,-130.08)    2.14                33