Simultaneous Nadir Overpasses (SNOs) between NOAA-21 and LANDSAT-9
TLE Epoch: 2023 1 10.  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)
 01/11/2023   23:02:08   (  70.13,-169.16) 01/11/2023   23:02:56  (  70.12,-169.18)    1.04                48
 01/11/2023   23:52:50   ( -70.04,  -1.71) 01/11/2023   23:52:26  ( -70.01,  -1.70)    3.30                24
 01/14/2023   15:19:01   (  70.10, -53.36) 01/14/2023   15:19:23  (  70.09, -53.34)    2.12                22
 01/14/2023   16:09:42   ( -69.96, 114.18) 01/14/2023   16:08:53  ( -69.98, 114.14)    2.33                49
 01/17/2023   06:45:11   ( -70.20,-105.05) 01/17/2023   06:46:23  ( -70.19,-104.94)    4.06                72
 01/17/2023   07:35:54   (  70.04,  62.51) 01/17/2023   07:35:51  (  70.03,  62.46)    2.24                 3
 01/17/2023   08:26:35   ( -69.89,-129.95) 01/17/2023   08:25:21  ( -69.92,-130.05)    4.96                74
 01/19/2023   23:02:04   ( -70.14,  10.81) 01/19/2023   23:02:51  ( -70.11,  10.82)    3.46                47
 01/19/2023   23:52:47   (  69.98, 178.37) 01/19/2023   23:52:18  (  69.99, 178.30)    2.83                29
 01/22/2023   14:28:29   (  70.92, -41.98) 01/22/2023   14:29:36  (  70.81, -39.88)   77.62                67
 01/22/2023   15:18:57   ( -70.09, 126.66) 01/22/2023   15:19:17  ( -70.10, 126.71)    2.77                20
 01/22/2023   16:09:41   (  69.98, -65.87) 01/22/2023   16:08:44  (  69.99, -65.81)    2.22                57