Simultaneous Nadir Overpasses (SNOs) between NOAA-21 and LANDSAT-8
TLE Epoch: 2023 1 6.  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)
 01/07/2023   22:36:54   (  70.55,-163.48) 01/07/2023   22:38:05  (  70.43,-162.56)   36.72                71
 01/07/2023   23:27:29   ( -70.10,   4.55) 01/07/2023   23:27:39  ( -70.10,   4.60)    1.77                10
 01/08/2023   00:18:13   (  69.98, 172.04) 01/08/2023   00:17:06  (  70.00, 172.09)    2.70                67
 01/10/2023   14:53:41   (  70.15, -47.08) 01/10/2023   14:54:38  (  70.15, -47.08)    0.30                57
 01/10/2023   15:44:23   ( -70.06, 120.38) 01/10/2023   15:44:08  ( -70.05, 120.40)    1.87                15
 01/10/2023   16:34:54   (  69.25, -71.14) 01/10/2023   16:33:46  (  69.33, -72.94)   71.22                68
 01/13/2023   07:10:35   (  70.12,  68.73) 01/13/2023   07:11:06  (  70.13,  68.76)    1.33                31
 01/13/2023   08:01:17   ( -70.03,-123.81) 01/13/2023   08:00:36  ( -70.02,-123.75)    2.56                41
 01/15/2023   22:36:51   ( -70.58,  16.47) 01/15/2023   22:38:01  ( -70.47,  17.49)   40.08                70
 01/15/2023   23:27:27   (  70.05,-175.39) 01/15/2023   23:27:33  (  70.08,-175.42)    2.90                 6
 01/16/2023   00:18:09   ( -69.96,  -7.93) 01/16/2023   00:17:03  ( -69.97,  -7.93)    1.97                66
 01/18/2023   14:53:37   ( -70.15, 132.92) 01/18/2023   14:54:34  ( -70.12, 132.88)    2.96                57
 01/18/2023   15:44:21   (  70.04, -59.61) 01/18/2023   15:44:00  (  70.06, -59.56)    2.81                21