Simultaneous Nadir Overpasses (SNOs) between NOAA-21 and LANDSAT-9
TLE Epoch: 2023 12 27.  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)
 12/27/2023   07:34:46   ( -69.98,-117.65) 12/27/2023   07:35:52  ( -69.95,-117.67)    3.46                66
 12/27/2023   08:25:30   (  69.86,  49.84) 12/27/2023   08:25:19  (  69.85,  49.83)    1.39                11
 12/27/2023   09:16:05   ( -69.40,-142.17) 12/27/2023   09:14:54  ( -69.46,-143.06)   35.24                71
 12/29/2023   23:51:40   ( -69.94,  -1.81) 12/29/2023   23:52:20  ( -69.94,  -1.79)    0.76                40
 12/30/2023   00:42:24   (  69.82, 165.67) 12/30/2023   00:41:47  (  69.83, 165.70)    1.91                37
 01/01/2024   15:18:02   (  70.53, -54.27) 01/01/2024   15:19:11  (  70.39, -52.89)   53.51                69
 01/01/2024   16:08:34   ( -69.91, 114.00) 01/01/2024   16:08:48  ( -69.90, 114.03)    2.11                14
 01/01/2024   16:59:18   (  69.80, -78.52) 01/01/2024   16:58:15  (  69.79, -78.47)    1.85                63
 01/04/2024   07:34:46   (  69.99,  62.35) 01/04/2024   07:35:45  (  69.98,  62.40)    2.23                59
 01/04/2024   08:25:27   ( -69.84,-130.12) 01/04/2024   08:25:15  ( -69.87,-130.11)    3.11                12
 01/04/2024   09:16:01   (  69.20,  38.13) 01/04/2024   09:14:51  (  69.26,  36.71)   56.47                70
 01/06/2024   23:51:38   (  69.93, 178.21) 01/06/2024   23:52:11  (  69.92, 178.21)    1.60                33
 01/07/2024   00:42:20   ( -69.84, -14.33) 01/07/2024   00:41:41  ( -69.81, -14.31)    3.25                39
 01/09/2024   15:17:54   ( -70.36, 126.02) 01/09/2024   15:19:05  ( -70.26, 126.95)   36.69                71
 01/09/2024   16:08:31   (  69.88, -65.94) 01/09/2024   16:08:37  (  69.87, -65.96)    1.61                 6
 01/09/2024   16:59:13   ( -69.79, 101.52) 01/09/2024   16:58:07  ( -69.77, 101.53)    2.64                66