Simultaneous Nadir Overpasses (SNOs) between NOAA-21 and LANDSAT-9
TLE Epoch: 2023 1 27.  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)
 01/27/2023   23:01:59   (  70.13,-169.18) 01/27/2023   23:02:55  (  70.15,-169.16)    1.77                56
 01/27/2023   23:52:41   ( -70.05,  -1.73) 01/27/2023   23:52:25  ( -70.03,  -1.68)    2.45                16
 01/28/2023   00:43:12   (  69.24, 166.76) 01/28/2023   00:42:04  (  69.27, 164.92)   72.32                68
 01/30/2023   15:18:51   (  70.08, -53.33) 01/30/2023   15:19:27  (  70.09, -53.36)    1.87                36
 01/30/2023   16:09:33   ( -69.99, 114.12) 01/30/2023   16:08:57  ( -69.98, 114.11)    1.14                36
 02/02/2023   06:45:11   ( -70.83,-106.06) 02/02/2023   06:46:19  ( -70.77,-104.14)   70.39                68
 02/02/2023   07:35:42   (  70.04,  62.51) 02/02/2023   07:35:57  (  70.06,  62.47)    3.07                15
 02/02/2023   08:26:24   ( -69.95,-130.04) 02/02/2023   08:25:27  ( -69.96,-130.05)    0.94                57
 02/04/2023   23:01:51   ( -70.17,  10.77) 02/04/2023   23:03:00  ( -70.16,  10.84)    2.49                69
 02/04/2023   23:52:34   (  70.01, 178.33) 02/04/2023   23:52:28  (  70.00, 178.25)    3.00                 6
 02/05/2023   00:43:13   ( -69.76, -13.98) 02/05/2023   00:42:00  ( -69.79, -14.41)   17.12                73
 02/07/2023   15:18:43   ( -70.14, 126.59) 02/07/2023   15:19:30  ( -70.13, 126.66)    3.45                47
 02/07/2023   16:09:26   (  69.99, -65.86) 02/07/2023   16:08:57  (  70.02, -65.85)    3.33                29