Simultaneous Nadir Overpasses (SNOs) between NOAA-21 and TERRA
TLE Epoch: 2023 9 17.  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)
 09/17/2023   17:37:12   ( -71.83,  88.86) 09/17/2023   17:38:19  ( -71.69,  91.10)   79.63                67
 09/17/2023   18:27:42   (  70.98,-102.34) 09/17/2023   18:27:53  (  70.99,-102.35)    1.70                11
 09/17/2023   19:18:24   ( -70.90,  65.11) 09/17/2023   19:17:18  ( -70.89,  65.14)    1.78                66
 09/20/2023   06:30:53   ( -71.07,-103.28) 09/20/2023   06:31:43  ( -71.05,-103.26)    2.25                50
 09/20/2023   07:21:37   (  70.95,  64.23) 09/20/2023   07:21:06  (  70.94,  64.23)    1.06                31
 09/22/2023   18:34:14   (  71.54,-104.91) 09/22/2023   18:35:24  (  71.44,-103.61)   47.14                70
 09/22/2023   19:24:47   ( -70.99,  63.37) 09/22/2023   19:24:56  ( -70.97,  63.29)    3.53                 9
 09/22/2023   20:15:31   (  70.87,-129.13) 09/22/2023   20:14:18  (  70.90,-129.15)    3.70                73
 09/25/2023   07:28:00   (  71.06,  62.45) 09/25/2023   07:28:42  (  71.05,  62.44)    0.93                42
 09/25/2023   08:18:42   ( -70.97,-130.08) 09/25/2023   08:18:07  ( -70.96,-130.04)    1.53                35
 09/27/2023   19:31:16   ( -71.41,  61.04) 09/27/2023   19:32:27  ( -71.30,  61.86)   31.56                71
 09/27/2023   20:21:54   (  71.00,-130.93) 09/27/2023   20:21:53  (  71.00,-130.95)    1.27                 1
 09/27/2023   21:12:33   ( -70.75,  36.80) 09/27/2023   21:11:20  ( -70.82,  36.42)   16.27                73
 09/30/2023   08:25:04   ( -71.05,-131.81) 09/30/2023   08:25:41  ( -71.07,-131.82)    2.92                37
 09/30/2023   09:15:48   (  70.94,  35.68) 09/30/2023   09:15:04  (  70.93,  35.62)    2.73                44