Simultaneous Nadir Overpasses (SNOs) between NOAA-21 and LANDSAT-8
TLE Epoch: 2022 12 24.  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)
 12/25/2022   14:53:42   (  70.16, -47.04) 12/25/2022   14:54:38  (  70.18, -47.03)    2.14                56
 12/25/2022   15:44:24   ( -70.07, 120.41) 12/25/2022   15:44:08  ( -70.07, 120.45)    1.35                16
 12/25/2022   16:34:55   (  69.26, -71.10) 12/25/2022   16:33:47  (  69.30, -72.96)   73.39                68
 12/28/2022   07:10:37   (  70.14,  68.75) 12/28/2022   07:11:08  (  70.15,  68.81)    2.61                31
 12/28/2022   08:01:18   ( -70.00,-123.71) 12/28/2022   08:00:39  ( -69.99,-123.79)    2.88                39
 12/30/2022   22:36:55   ( -70.61,  16.47) 12/30/2022   22:38:06  ( -70.48,  17.51)   41.21                71
 12/30/2022   23:27:31   (  70.07,-175.39) 12/30/2022   23:27:38  (  70.09,-175.40)    1.93                 7
 12/31/2022   00:18:13   ( -69.98,  -7.93) 12/31/2022   00:17:08  ( -69.99,  -7.91)    0.83                65
 01/02/2023   14:53:42   ( -70.18, 132.91) 01/02/2023   14:54:40  ( -70.16, 132.94)    1.92                58
 01/02/2023   15:44:26   (  70.07, -59.61) 01/02/2023   15:44:07  (  70.05, -59.58)    2.57                19
 01/02/2023   16:34:56   ( -69.34, 108.78) 01/02/2023   16:33:47  ( -69.40, 107.16)   63.64                69
 01/05/2023   07:10:35   ( -70.12,-111.24) 01/05/2023   07:11:07  ( -70.14,-111.21)    2.59                32
 01/05/2023   08:01:19   (  70.01,  56.23) 01/05/2023   08:00:34  (  70.02,  56.27)    1.85                45