Simultaneous Nadir Overpasses (SNOs) between NOAA-21 and LANDSAT-9
TLE Epoch: 2023 12 12.  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)
 12/13/2023   23:51:40   ( -69.93,  -1.81) 12/13/2023   23:52:20  ( -69.91,  -1.83)    2.77                40
 12/14/2023   00:42:24   (  69.82, 165.67) 12/14/2023   00:41:47  (  69.80, 165.67)    1.58                37
 12/16/2023   15:18:04   (  70.56, -54.33) 12/16/2023   15:19:13  (  70.44, -52.83)   57.51                69
 12/16/2023   16:08:35   ( -69.88, 114.03) 12/16/2023   16:08:51  ( -69.89, 114.02)    1.12                16
 12/16/2023   16:59:19   (  69.77, -78.49) 12/16/2023   16:58:18  (  69.79, -78.48)    1.56                61
 12/19/2023   07:34:47   (  69.94,  62.40) 12/19/2023   07:35:51  (  69.97,  62.36)    3.23                64
 12/19/2023   08:25:29   ( -69.84,-130.13) 12/19/2023   08:25:21  ( -69.86,-130.15)    2.24                 8
 12/19/2023   09:16:05   (  69.31,  37.95) 12/19/2023   09:14:55  (  69.36,  36.82)   44.85                70
 12/21/2023   23:51:42   (  69.90, 178.23) 12/21/2023   23:52:22  (  69.91, 178.17)    2.49                40
 12/22/2023   00:42:24   ( -69.80, -14.31) 12/22/2023   00:41:52  ( -69.81, -14.34)    1.45                32
 12/24/2023   15:18:07   ( -70.71, 125.42) 12/24/2023   15:19:15  ( -70.56, 127.33)   72.65                68
 12/24/2023   16:08:37   (  69.87, -65.96) 12/24/2023   16:08:52  (  69.90, -65.98)    2.86                15
 12/24/2023   16:59:19   ( -69.77, 101.51) 12/24/2023   16:58:22  ( -69.80, 101.52)    2.92                57