Simultaneous Nadir Overpasses (SNOs) between NOAA-21 and LANDSAT-9
TLE Epoch: 2023 2 16.  Predictions up to the next  14.0 days:

     Date     Time(NOAA-21) NOAA-21 Lat/Lon Date Time(LANDSAT-9) LANDSAT-9 Lat/Lon    Distance(km)  Time Diff(sec)
 02/18/2023   06:45:06   ( -70.92,-106.22) 02/18/2023   06:46:14  ( -70.81,-104.09)   78.36                68
 02/18/2023   07:35:36   (  70.07,  62.44) 02/18/2023   07:35:53  (  70.05,  62.43)    2.18                17
 02/18/2023   08:26:17   ( -69.92,-130.02) 02/18/2023   08:25:23  ( -69.93,-130.09)    2.87                54
 02/20/2023   23:01:47   ( -70.15,  10.77) 02/20/2023   23:02:51  ( -70.14,  10.82)    2.30                64
 02/20/2023   23:52:31   (  70.04, 178.25) 02/20/2023   23:52:18  (  70.03, 178.31)    2.49                13
 02/21/2023   00:43:05   ( -69.52, -13.67) 02/21/2023   00:41:54  ( -69.59, -14.67)   39.40                71
 02/23/2023   15:18:41   ( -70.09, 126.63) 02/23/2023   15:19:16  ( -70.07, 126.62)    1.63                35
 02/23/2023   16:09:25   (  69.98, -65.90) 02/23/2023   16:08:43  (  69.96, -65.89)    1.95                42
 02/26/2023   06:44:56   (  70.30,  74.75) 02/26/2023   06:46:08  (  70.22,  75.10)   15.64                72
 02/26/2023   07:35:35   ( -70.04,-117.53) 02/26/2023   07:35:39  ( -70.06,-117.50)    2.06                 4
 02/26/2023   08:26:19   (  69.94,  49.94) 02/26/2023   08:25:06  (  69.94,  49.98)    1.77                73
 02/28/2023   23:01:46   (  70.11,-169.19) 02/28/2023   23:02:31  (  70.09,-169.19)    3.02                45
 02/28/2023   23:52:27   ( -69.96,  -1.64) 02/28/2023   23:52:01  ( -69.98,  -1.70)    3.22                26