Simultaneous Nadir Overpasses (SNOs) between NOAA-21 and LANDSAT-8
TLE Epoch: 2023 1 3.  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)
 01/05/2023   07:10:35   ( -70.13,-111.25) 01/05/2023   07:11:11  ( -70.10,-111.28)    3.31                36
 01/05/2023   08:01:19   (  70.01,  56.24) 01/05/2023   08:00:38  (  69.99,  56.21)    2.00                41
 01/07/2023   22:36:54   (  70.54,-163.45) 01/07/2023   22:38:05  (  70.45,-162.54)   35.67                71
 01/07/2023   23:27:29   ( -70.08,   4.58) 01/07/2023   23:27:40  ( -70.06,   4.54)    2.51                11
 01/08/2023   00:18:13   (  69.97, 172.06) 01/08/2023   00:17:07  (  69.95, 172.03)    1.87                66
 01/10/2023   14:53:41   (  70.14, -47.06) 01/10/2023   14:54:38  (  70.16, -47.07)    2.82                57
 01/10/2023   15:44:23   ( -70.04, 120.40) 01/10/2023   15:44:08  ( -70.06, 120.42)    1.66                15
 01/10/2023   16:34:55   (  69.29, -71.19) 01/10/2023   16:33:46  (  69.34, -72.92)   68.15                69
 01/13/2023   07:10:34   (  70.11,  68.75) 01/13/2023   07:11:05  (  70.13,  68.77)    2.52                31
 01/13/2023   08:01:16   ( -70.01,-123.79) 01/13/2023   08:00:35  ( -70.03,-123.74)    2.47                41
 01/15/2023   22:36:51   ( -70.56,  16.50) 01/15/2023   22:38:02  ( -70.41,  17.42)   38.01                71
 01/15/2023   23:27:28   (  70.09,-175.45) 01/15/2023   23:27:33  (  70.08,-175.42)    1.92                 5
 01/16/2023   00:18:10   ( -69.99,  -7.98) 01/16/2023   00:17:03  ( -69.98,  -7.93)    2.70                67