Simultaneous Nadir Overpasses (SNOs) between NOAA-21 and LANDSAT-9
TLE Epoch: 2023 8 4.  Predictions up to the next  14.0 days:

     Date     Time(NOAA-21) NOAA-21 Lat/Lon Date Time(LANDSAT-9) LANDSAT-9 Lat/Lon    Distance(km)  Time Diff(sec)
 08/05/2023   07:34:02   ( -70.14,-117.59) 08/05/2023   07:35:14  ( -70.10,-117.40)    8.85                72
 08/05/2023   08:24:44   (  69.92,  50.05) 08/05/2023   08:24:42  (  69.95,  50.04)    2.58                 2
 08/05/2023   09:15:25   ( -69.78,-142.42) 08/05/2023   09:14:13  ( -69.77,-142.57)    5.74                72
 08/07/2023   23:50:51   ( -69.99,  -1.58) 08/07/2023   23:51:46  ( -70.00,  -1.66)    2.95                55
 08/08/2023   00:41:35   (  69.88, 165.89) 08/08/2023   00:41:13  (  69.90, 165.85)    2.33                22
 08/08/2023   01:32:03   ( -69.05, -25.59) 08/08/2023   01:30:55  ( -69.12, -27.56)   78.66                68
 08/10/2023   16:07:42   ( -69.96, 114.25) 08/10/2023   16:08:16  ( -69.98, 114.20)    3.06                34
 08/10/2023   16:58:26   (  69.85, -78.28) 08/10/2023   16:57:43  (  69.87, -78.30)    2.69                43
 08/13/2023   07:34:00   (  70.50,  61.87) 08/13/2023   07:35:10  (  70.36,  63.01)   45.00                70
 08/13/2023   08:24:33   ( -69.93,-129.93) 08/13/2023   08:24:46  ( -69.93,-129.99)    2.53                13
 08/13/2023   09:15:17   (  69.83,  37.54) 08/13/2023   09:14:13  (  69.82,  37.51)    1.64                64
 08/15/2023   23:50:41   (  70.01, 178.42) 08/15/2023   23:51:44  (  70.00, 178.38)    1.83                63
 08/16/2023   00:41:23   ( -69.92, -14.12) 08/16/2023   00:41:14  ( -69.90, -14.14)    2.00                 9
 08/16/2023   01:31:58   (  69.33, 154.04) 08/16/2023   01:30:48  (  69.40, 152.83)   48.05                70