Simultaneous Nadir Overpasses (SNOs) between NOAA-21 and LANDSAT-8
TLE Epoch: 2022 12 28.  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)
 12/28/2022   07:10:37   (  70.11,  68.79) 12/28/2022   07:11:10  (  70.09,  68.72)    3.32                33
 12/28/2022   08:01:19   ( -70.03,-123.76) 12/28/2022   08:00:39  ( -70.04,-123.72)    1.82                40
 12/30/2022   22:36:55   ( -70.64,  16.42) 12/30/2022   22:38:05  ( -70.56,  17.63)   45.56                70
 12/30/2022   23:27:31   (  70.10,-175.43) 12/30/2022   23:27:38  (  70.12,-175.36)    3.60                 7
 12/31/2022   00:18:12   ( -69.96,  -7.90) 12/31/2022   00:17:09  ( -69.96,  -7.96)    2.22                63
 01/02/2023   14:53:41   ( -70.16, 132.94) 01/02/2023   14:54:41  ( -70.19, 132.96)    3.36                60
 01/02/2023   15:44:25   (  70.04, -59.58) 01/02/2023   15:44:09  (  70.02, -59.63)    3.03                16
 01/02/2023   16:34:57   ( -69.42, 108.65) 01/02/2023   16:33:47  ( -69.48, 107.26)   54.73                70
 01/05/2023   07:10:35   ( -70.10,-111.22) 01/05/2023   07:11:11  ( -70.12,-111.25)    2.51                36
 01/05/2023   08:01:19   (  69.99,  56.26) 01/05/2023   08:00:38  (  70.01,  56.23)    2.17                41
 01/07/2023   22:36:55   (  70.58,-163.51) 01/07/2023   22:38:05  (  70.47,-162.50)   39.14                70
 01/07/2023   23:27:30   ( -70.11,   4.54) 01/07/2023   23:27:40  ( -70.09,   4.59)    2.57                10
 01/08/2023   00:18:13   (  69.95, 172.09) 01/08/2023   00:17:07  (  69.98, 172.07)    3.26                66
 01/10/2023   14:53:41   (  70.17, -47.10) 01/10/2023   14:54:38  (  70.14, -47.10)    3.31                57
 01/10/2023   15:44:23   ( -70.07, 120.36) 01/10/2023   15:44:08  ( -70.04, 120.40)    3.32                15
 01/10/2023   16:34:54   (  69.27, -71.16) 01/10/2023   16:33:46  (  69.31, -72.95)   70.55                68