Simultaneous Nadir Overpasses (SNOs) between NOAA-21 and LANDSAT-8
TLE Epoch: 2022 12 30.  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)
 12/30/2022   22:36:56   ( -70.65,  16.40) 12/30/2022   22:38:06  ( -70.55,  17.61)   46.28                70
 12/30/2022   23:27:32   (  70.11,-175.45) 12/30/2022   23:27:39  (  70.12,-175.37)    2.86                 7
 12/31/2022   00:18:13   ( -69.97,  -7.92) 12/31/2022   00:17:10  ( -69.95,  -7.97)    3.35                63
 01/02/2023   14:53:41   ( -70.17, 132.92) 01/02/2023   14:54:41  ( -70.18, 132.95)    1.52                60
 01/02/2023   15:44:25   (  70.05, -59.60) 01/02/2023   15:44:08  (  70.07, -59.56)    2.39                17
 01/02/2023   16:34:57   ( -69.44, 108.63) 01/02/2023   16:33:47  ( -69.47, 107.25)   54.24                70
 01/05/2023   07:10:35   ( -70.12,-111.24) 01/05/2023   07:11:11  ( -70.12,-111.26)    0.86                36
 01/05/2023   08:01:19   (  70.00,  56.24) 01/05/2023   08:00:38  (  70.01,  56.23)    0.73                41
 01/07/2023   22:36:55   (  70.59,-163.53) 01/07/2023   22:38:05  (  70.47,-162.50)   40.17                70
 01/07/2023   23:27:29   ( -70.07,   4.60) 01/07/2023   23:27:40  ( -70.09,   4.59)    2.83                11
 01/08/2023   00:18:13   (  69.96, 172.08) 01/08/2023   00:17:07  (  69.98, 172.07)    2.33                66
 01/10/2023   14:53:41   (  70.13, -47.04) 01/10/2023   14:54:39  (  70.15, -47.09)    2.99                58
 01/10/2023   15:44:23   ( -70.03, 120.43) 01/10/2023   15:44:09  ( -70.05, 120.41)    2.41                14
 01/10/2023   16:34:55   (  69.28, -71.18) 01/10/2023   16:33:47  (  69.33, -72.94)   69.41                68