Simultaneous Nadir Overpasses (SNOs) between NOAA-21 and LANDSAT-9
TLE Epoch: 2023 1 28.  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)
 01/30/2023   15:18:51   (  70.12, -53.40) 01/30/2023   15:19:26  (  70.11, -53.34)    2.66                35
 01/30/2023   16:09:32   ( -69.98, 114.13) 01/30/2023   16:08:56  ( -70.00, 114.13)    1.49                36
 02/02/2023   06:45:12   ( -70.87,-106.13) 02/02/2023   06:46:20  ( -70.74,-104.19)   72.40                68
 02/02/2023   07:35:43   (  70.08,  62.44) 02/02/2023   07:35:57  (  70.09,  62.50)    2.27                14
 02/02/2023   08:26:24   ( -69.94,-130.02) 02/02/2023   08:25:28  ( -69.92,-130.10)    3.27                56
 02/04/2023   23:01:51   ( -70.16,  10.79) 02/04/2023   23:03:01  ( -70.15,  10.81)    1.55                70
 02/04/2023   23:52:35   (  70.05, 178.26) 02/04/2023   23:52:28  (  70.04, 178.30)    1.92                 7
 02/05/2023   00:43:13   ( -69.75, -13.96) 02/05/2023   00:42:00  ( -69.82, -14.37)   17.76                73
 02/07/2023   15:18:43   ( -70.13, 126.60) 02/07/2023   15:19:31  ( -70.13, 126.66)    2.12                48
 02/07/2023   16:09:27   (  70.03, -65.93) 02/07/2023   16:08:58  (  70.02, -65.86)    3.03                29
 02/07/2023   16:59:51   ( -68.98, 102.90) 02/07/2023   16:58:44  ( -69.03, 100.45)   97.84                67
 02/10/2023   06:45:09   (  71.11,  73.49) 02/10/2023   06:46:15  (  71.00,  76.21)   99.01                66
 02/10/2023   07:35:33   ( -70.07,-117.52) 02/10/2023   07:36:00  ( -70.08,-117.54)    1.61                27
 02/10/2023   08:26:17   (  69.96,  49.95) 02/10/2023   08:25:27  (  69.96,  49.95)    0.26                50