Simultaneous Nadir Overpasses (SNOs) between NOAA-21 and LANDSAT-9
TLE Epoch: 2023 10 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)
 10/13/2023   16:07:40   ( -69.99, 114.14) 10/13/2023   16:08:42  ( -70.00, 114.19)    2.42                62
 10/13/2023   16:58:24   (  69.87, -78.38) 10/13/2023   16:58:09  (  69.90, -78.31)    3.68                15
 10/13/2023   17:48:57   ( -69.31,  89.76) 10/13/2023   17:47:46  ( -69.40,  88.65)   44.48                71
 10/16/2023   08:24:32   ( -69.94,-130.01) 10/16/2023   08:25:14  ( -69.93,-130.04)    2.14                42
 10/16/2023   09:15:16   (  69.83,  37.46) 10/16/2023   09:14:41  (  69.82,  37.46)    1.53                35
 10/18/2023   23:50:56   (  70.74, 177.19) 10/18/2023   23:52:03  (  70.62, 179.22)   75.81                67
 10/19/2023   00:41:24   ( -69.91, -14.19) 10/19/2023   00:41:44  ( -69.91, -14.18)    0.40                20
 10/19/2023   01:32:08   (  69.80, 153.28) 10/19/2023   01:31:11  (  69.80, 153.31)    1.19                57
 10/21/2023   16:07:33   (  69.99, -65.85) 10/21/2023   16:08:42  (  70.01, -65.79)    2.72                69
 10/21/2023   16:58:14   ( -69.84, 101.70) 10/21/2023   16:58:13  ( -69.85, 101.62)    3.19                 1
 10/21/2023   17:48:55   (  69.58, -90.60) 10/21/2023   17:47:42  (  69.63, -91.04)   17.77                73
 10/24/2023   08:24:24   (  69.94,  50.01) 10/24/2023   08:25:11  (  69.95,  50.02)    1.17                47
 10/24/2023   09:15:06   ( -69.84,-142.52) 10/24/2023   09:14:41  ( -69.85,-142.49)    1.68                25