Simultaneous Nadir Overpasses (SNOs) between NOAA-21 and LANDSAT-9
TLE Epoch: 2023 11 28.  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)
 11/30/2023   15:18:01   (  70.71, -54.56) 11/30/2023   15:19:09  (  70.58, -52.61)   73.46                68
 11/30/2023   16:08:29   ( -69.88, 114.06) 11/30/2023   16:08:50  ( -69.87, 113.99)    3.04                21
 11/30/2023   16:59:13   (  69.77, -78.46) 11/30/2023   16:58:17  (  69.76, -78.51)    1.95                56
 12/03/2023   07:34:44   (  69.99,  62.34) 12/03/2023   07:35:48  (  69.98,  62.40)    2.95                64
 12/03/2023   08:25:25   ( -69.84,-130.12) 12/03/2023   08:25:18  ( -69.87,-130.12)    3.28                 7
 12/03/2023   09:16:02   (  69.36,  37.89) 12/03/2023   09:14:51  (  69.43,  36.92)   38.65                71
 12/05/2023   23:51:39   (  69.92, 178.22) 12/05/2023   23:52:16  (  69.93, 178.22)    1.56                37
 12/06/2023   00:42:21   ( -69.82, -14.31) 12/06/2023   00:41:46  ( -69.83, -14.29)    1.46                35
 12/08/2023   15:17:59   ( -70.49, 125.79) 12/08/2023   15:19:09  ( -70.34, 127.06)   49.73                70
 12/08/2023   16:08:34   (  69.91, -66.01) 12/08/2023   16:08:42  (  69.90, -65.93)    3.28                 8
 12/08/2023   16:59:15   ( -69.76, 101.55) 12/08/2023   16:58:13  ( -69.74, 101.48)    3.09                62
 12/11/2023   07:34:45   ( -69.97,-117.63) 12/11/2023   07:35:42  ( -69.94,-117.63)    3.49                57
 12/11/2023   08:25:28   (  69.81,  49.91) 12/11/2023   08:25:09  (  69.82,  49.85)    2.28                19