Simultaneous Nadir Overpasses (SNOs) between NOAA-21 and LANDSAT-8
TLE Epoch: 2023 11 18.  Predictions up to the next  14.0 days:

     Date     Time(NOAA-21) NOAA-21 Lat/Lon Date Time(LANDSAT-8) LANDSAT-8 Lat/Lon    Distance(km)  Time Diff(sec)
 11/18/2023   15:43:00   (  70.00, -59.73) 11/18/2023   15:43:58  (  69.99, -59.66)    2.91                58
 11/18/2023   16:33:41   ( -69.85, 107.81) 11/18/2023   16:33:28  ( -69.88, 107.82)    3.37                13
 11/18/2023   17:24:14   (  69.15, -83.87) 11/18/2023   17:23:05  (  69.22, -85.42)   61.74                69
 11/21/2023   07:59:57   (  69.95,  56.10) 11/21/2023   08:00:29  (  69.95,  56.15)    2.34                32
 11/21/2023   08:50:39   ( -69.85,-136.44) 11/21/2023   08:49:59  ( -69.83,-136.37)    3.31                40
 11/23/2023   23:26:17   ( -70.39,   3.87) 11/23/2023   23:27:28  ( -70.26,   4.83)   38.78                71
 11/24/2023   00:16:53   (  69.86, 171.99) 11/24/2023   00:17:00  (  69.88, 171.94)    2.83                 7
 11/24/2023   01:07:35   ( -69.76, -20.54) 11/24/2023   01:06:30  ( -69.77, -20.58)    2.03                65
 11/26/2023   15:43:05   ( -69.94, 120.33) 11/26/2023   15:44:02  ( -69.96, 120.28)    3.04                57
 11/26/2023   16:33:49   (  69.83, -72.20) 11/26/2023   16:33:29  (  69.85, -72.23)    1.87                20
 11/26/2023   17:24:19   ( -69.09,  96.18) 11/26/2023   17:23:10  ( -69.14,  94.45)   68.66                69
 11/29/2023   08:00:02   ( -69.91,-123.87) 11/29/2023   08:00:32  ( -69.91,-123.91)    1.53                30
 11/29/2023   08:50:46   (  69.81,  43.59) 11/29/2023   08:49:59  (  69.79,  43.58)    1.96                47
 12/01/2023   23:26:19   (  70.11,-175.73) 12/01/2023   23:27:30  (  70.05,-175.46)   12.45                71
 12/02/2023   00:16:59   ( -69.90,  -8.08) 12/02/2023   00:17:01  ( -69.89,  -8.05)    1.45                 2
 12/02/2023   01:07:41   (  69.69, 159.53) 12/02/2023   01:06:29  (  69.72, 159.36)    7.25                72