Simultaneous Nadir Overpasses (SNOs) between NOAA-21 and LANDSAT-9
TLE Epoch: 2022 12 3.  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)
 12/04/2022   18:42:12   (  70.20,-104.21) 12/04/2022   18:43:20  (  70.20,-104.15)    2.44                68
 12/04/2022   19:32:35   ( -70.09,  63.35) 12/04/2022   19:32:50  ( -70.08,  63.32)    1.88                15
 12/04/2022   20:23:18   (  69.97,-129.14) 12/04/2022   20:22:17  (  69.98,-129.18)    2.22                61
 12/07/2022   19:12:56   (  70.95,-113.02) 12/07/2022   19:14:03  (  70.88,-110.85)   79.12                67
 12/07/2022   20:03:06   ( -70.16,  55.64) 12/07/2022   20:03:44  ( -70.17,  55.72)    3.26                38
 12/07/2022   20:53:49   (  70.03,-136.84) 12/07/2022   20:53:12  (  70.01,-136.86)    1.60                37
 12/07/2022   21:44:01   ( -69.34,  31.56) 12/07/2022   21:42:52  ( -69.35,  29.87)   66.29                69
 12/10/2022   20:33:35   ( -70.17,  48.01) 12/10/2022   20:34:38  ( -70.19,  48.02)    1.71                63
 12/10/2022   21:24:19   (  70.10,-144.57) 12/10/2022   21:24:05  (  70.08,-144.49)    3.65                14
 12/10/2022   22:14:42   ( -69.99,  23.00) 12/10/2022   22:13:35  ( -69.98,  22.99)    1.66                67
 12/13/2022   21:04:15   ( -70.72,  39.54) 12/13/2022   21:05:25  ( -70.62,  40.93)   52.23                70
 12/13/2022   21:54:48   (  70.08,-152.15) 12/13/2022   21:55:00  (  70.08,-152.23)    3.03                12
 12/13/2022   22:45:12   ( -70.01,  15.36) 12/13/2022   22:44:29  ( -70.03,  15.34)    2.31                43
 12/16/2022   22:25:18   (  70.13,-159.83) 12/16/2022   22:25:53  (  70.16,-159.83)    3.08                35
 12/16/2022   23:15:43   ( -70.08,   7.64) 12/16/2022   23:15:23  ( -70.06,   7.66)    2.49                20
 12/17/2022   00:06:10   (  69.15, 176.31) 12/17/2022   00:05:03  (  69.23, 174.17)   85.03                67