Simultaneous Nadir Overpasses (SNOs) between NOAA-21 and LANDSAT-8
TLE Epoch: 2023 1 10.  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)
 01/10/2023   14:53:41   (  70.17, -47.11) 01/10/2023   14:54:37  (  70.18, -47.04)    2.76                56
 01/10/2023   15:44:22   ( -70.03, 120.42) 01/10/2023   15:44:08  ( -70.01, 120.35)    3.32                14
 01/10/2023   16:34:54   (  69.27, -71.16) 01/10/2023   16:33:46  (  69.30, -72.97)   71.38                68
 01/13/2023   07:10:34   (  70.09,  68.78) 01/13/2023   07:11:06  (  70.09,  68.71)    2.81                32
 01/13/2023   08:01:16   ( -70.00,-123.77) 01/13/2023   08:00:36  ( -69.98,-123.81)    3.16                40
 01/15/2023   22:36:51   ( -70.55,  16.52) 01/15/2023   22:38:02  ( -70.41,  17.41)   36.83                71
 01/15/2023   23:27:28   (  70.07,-175.42) 01/15/2023   23:27:33  (  70.08,-175.42)    0.82                 5
 01/16/2023   00:18:10   ( -69.98,  -7.97) 01/16/2023   00:17:03  ( -69.97,  -7.94)    1.53                67
 01/18/2023   14:53:38   ( -70.17, 132.88) 01/18/2023   14:54:33  ( -70.16, 132.93)    2.52                55
 01/18/2023   15:44:21   (  70.06, -59.64) 01/18/2023   15:43:59  (  70.04, -59.58)    3.04                22
 01/18/2023   16:34:49   ( -69.23, 108.89) 01/18/2023   16:33:41  ( -69.28, 107.01)   74.51                68
 01/21/2023   07:10:30   ( -70.11,-111.26) 01/21/2023   07:10:59  ( -70.10,-111.26)    1.51                29
 01/21/2023   08:01:14   (  70.01,  56.21) 01/21/2023   08:00:26  (  69.98,  56.22)    2.65                48
 01/23/2023   22:36:43   (  70.27,-163.05) 01/23/2023   22:37:54  (  70.23,-162.82)    9.98                71
 01/23/2023   23:27:23   ( -70.06,   4.58) 01/23/2023   23:27:25  ( -70.07,   4.59)    0.93                 2
 01/24/2023   00:18:06   (  69.91, 172.13) 01/24/2023   00:16:53  (  69.90, 171.99)    5.23                73