Simultaneous Nadir Overpasses (SNOs) between NOAA-21 and LANDSAT-9
TLE Epoch: 2023 12 11.  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)
 12/11/2023   07:34:44   ( -69.94,-117.59) 12/11/2023   07:35:48  ( -69.95,-117.64)    2.55                64
 12/11/2023   08:25:28   (  69.82,  49.89) 12/11/2023   08:25:15  (  69.85,  49.86)    3.11                13
 12/11/2023   09:16:02   ( -69.31,-142.04) 12/11/2023   09:14:51  ( -69.41,-143.10)   43.26                71
 12/13/2023   23:51:40   ( -69.94,  -1.82) 12/13/2023   23:52:19  ( -69.96,  -1.76)    2.84                39
 12/14/2023   00:42:24   (  69.83, 165.66) 12/14/2023   00:41:47  (  69.80, 165.66)    3.51                37
 12/16/2023   15:18:04   (  70.57, -54.35) 12/16/2023   15:19:13  (  70.43, -52.84)   58.26                69
 12/16/2023   16:08:35   ( -69.89, 114.02) 12/16/2023   16:08:51  ( -69.89, 114.02)    0.57                16
 12/16/2023   16:59:19   (  69.78, -78.51) 12/16/2023   16:58:18  (  69.78, -78.49)    0.80                61
 12/19/2023   07:34:48   (  69.95,  62.38) 12/19/2023   07:35:52  (  69.96,  62.36)    1.33                64
 12/19/2023   08:25:30   ( -69.85,-130.15) 12/19/2023   08:25:22  ( -69.86,-130.15)    0.53                 8
 12/19/2023   09:16:06   (  69.32,  37.93) 12/19/2023   09:14:56  (  69.36,  36.82)   44.09                70
 12/21/2023   23:51:42   (  69.92, 178.20) 12/21/2023   23:52:22  (  69.91, 178.17)    1.75                40
 12/22/2023   00:42:24   ( -69.82, -14.33) 12/22/2023   00:41:52  ( -69.81, -14.34)    1.06                32
 12/24/2023   15:18:06   ( -70.68, 125.47) 12/24/2023   15:19:14  ( -70.62, 127.42)   72.04                68
 12/24/2023   16:08:37   (  69.89, -65.99) 12/24/2023   16:08:52  (  69.90, -65.97)    0.81                15
 12/24/2023   16:59:19   ( -69.79, 101.48) 12/24/2023   16:58:22  ( -69.80, 101.52)    1.86                57