Simultaneous Nadir Overpasses (SNOs) between NOAA-21 and LANDSAT-9
TLE Epoch: 2023 1 26.  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)
 01/27/2023   23:01:58   (  70.10,-169.14) 01/27/2023   23:02:55  (  70.12,-169.20)    2.68                57
 01/27/2023   23:52:40   ( -70.02,  -1.69) 01/27/2023   23:52:25  ( -70.01,  -1.72)    1.79                15
 01/28/2023   00:43:11   (  69.21, 166.80) 01/28/2023   00:42:03  (  69.30, 164.96)   73.02                68
 01/30/2023   15:18:51   (  70.11, -53.37) 01/30/2023   15:19:26  (  70.11, -53.33)    1.52                35
 01/30/2023   16:09:33   ( -70.02, 114.08) 01/30/2023   16:08:56  ( -70.00, 114.14)    2.79                37
 02/02/2023   06:45:12   ( -70.86,-106.10) 02/02/2023   06:46:20  ( -70.72,-104.21)   70.84                68
 02/02/2023   07:35:43   (  70.07,  62.46) 02/02/2023   07:35:57  (  70.07,  62.48)    0.69                14
 02/02/2023   08:26:25   ( -69.98,-130.08) 02/02/2023   08:25:27  ( -69.96,-130.04)    2.02                58
 02/04/2023   23:01:51   ( -70.15,  10.81) 02/04/2023   23:03:00  ( -70.16,  10.83)    1.50                69
 02/04/2023   23:52:35   (  70.04, 178.28) 02/04/2023   23:52:27  (  70.05, 178.32)    1.75                 8
 02/05/2023   00:43:13   ( -69.73, -13.94) 02/05/2023   00:42:00  ( -69.78, -14.42)   19.04                73
 02/07/2023   15:18:42   ( -70.13, 126.62) 02/07/2023   15:19:29  ( -70.10, 126.63)    2.94                47
 02/07/2023   16:09:25   (  69.97, -65.84) 02/07/2023   16:08:56  (  69.99, -65.89)    2.67                29