Simultaneous Nadir Overpasses (SNOs) between NOAA-21 and LANDSAT-9
TLE Epoch: 2022 12 11.  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   ( -70.17,-121.98) 12/13/2022   07:54:28  ( -70.19,-121.95)    2.38                59
 12/13/2022   08:44:13   (  70.05,  45.50) 12/13/2022   08:43:56  (  70.03,  45.47)    2.72                17
 12/13/2022   09:34:41   ( -69.74,-146.67) 12/13/2022   09:33:28  ( -69.81,-147.20)   22.06                73
 12/16/2022   04:17:40   (  70.13, 112.03) 12/16/2022   04:18:08  (  70.13, 112.06)    1.40                28
 12/16/2022   05:08:12   ( -70.01, -80.43) 12/16/2022   05:07:38  ( -70.03, -80.46)    2.18                34
 12/18/2022   23:51:09   (  70.27, 178.45) 12/18/2022   23:52:21  (  70.22, 178.62)    9.08                72
 12/19/2022   00:41:40   ( -70.08, -13.90) 12/19/2022   00:41:51  ( -70.11, -13.90)    2.94                11
 12/19/2022   01:32:24   (  70.00, 153.54) 12/19/2022   01:31:18  (  70.00, 153.59)    2.03                66
 12/21/2022   20:15:08   ( -70.17,  52.60) 12/21/2022   20:16:04  ( -70.17,  52.63)    1.13                56
 12/21/2022   21:05:51   (  70.06,-139.91) 12/21/2022   21:05:31  (  70.06,-139.88)    1.16                20
 12/21/2022   21:56:18   ( -69.64,  28.07) 12/21/2022   21:55:06  ( -69.68,  27.22)   33.22                72
 12/24/2022   16:39:16   (  70.09, -73.31) 12/24/2022   16:39:43  (  70.09, -73.39)    2.99                27
 12/24/2022   17:29:50   ( -70.01,  94.17) 12/24/2022   17:29:13  ( -69.99,  94.10)    2.93                37