Simultaneous Nadir Overpasses (SNOs) between NOAA-21 and LANDSAT-9
TLE Epoch: 2022 12 13.  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)
 12/13/2022   07:53:29   ( -70.18,-122.00) 12/13/2022   07:54:28  ( -70.17,-121.97)    1.64                59
 12/13/2022   08:44:13   (  70.06,  45.49) 12/13/2022   08:43:55  (  70.07,  45.53)    1.99                18
 12/13/2022   09:34:41   ( -69.75,-146.68) 12/13/2022   09:33:28  ( -69.79,-147.22)   21.38                73
 12/16/2022   04:17:41   (  70.14, 112.02) 12/16/2022   04:18:09  (  70.12, 112.04)    2.10                28
 12/16/2022   05:08:13   ( -70.02, -80.45) 12/16/2022   05:07:39  ( -70.01, -80.48)    1.72                34
 12/18/2022   23:51:09   (  70.29, 178.43) 12/18/2022   23:52:20  (  70.26, 178.68)    9.81                71
 12/19/2022   00:41:40   ( -70.10, -13.92) 12/19/2022   00:41:51  ( -70.10, -13.92)    0.16                11
 12/19/2022   01:32:24   (  70.01, 153.52) 12/19/2022   01:31:18  (  69.99, 153.57)    3.30                66
 12/21/2022   20:15:08   ( -70.19,  52.59) 12/21/2022   20:16:04  ( -70.16,  52.62)    2.92                56
 12/21/2022   21:05:51   (  70.07,-139.93) 12/21/2022   21:05:31  (  70.05,-139.90)    2.93                20
 12/21/2022   21:56:17   ( -69.60,  28.13) 12/21/2022   21:55:06  ( -69.67,  27.21)   36.80                71
 12/24/2022   16:39:17   (  70.10, -73.33) 12/24/2022   16:39:44  (  70.09, -73.40)    2.98                27
 12/24/2022   17:29:51   ( -70.02,  94.15) 12/24/2022   17:29:13  ( -70.04,  94.17)    2.67                38