Simultaneous Nadir Overpasses (SNOs) between NOAA-21 and LANDSAT-9
TLE Epoch: 2023 5 3.  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)
 05/03/2023   23:00:53   (  70.65,-169.93) 05/03/2023   23:02:02  (  70.55,-168.60)   50.28                69
 05/03/2023   23:51:25   ( -70.04,  -1.65) 05/03/2023   23:51:39  ( -70.05,  -1.69)    1.77                14
 05/04/2023   00:42:10   (  69.96, 165.77) 05/04/2023   00:41:06  (  69.95, 165.81)    2.57                64
 05/06/2023   15:17:40   (  70.12, -53.34) 05/06/2023   15:18:35  (  70.12, -53.33)    0.59                55
 05/06/2023   16:08:21   ( -69.99, 114.18) 05/06/2023   16:08:05  ( -70.00, 114.13)    2.50                16
 05/06/2023   16:58:52   (  69.17, -77.33) 05/06/2023   16:57:44  (  69.23, -79.26)   76.81                68
 05/09/2023   07:34:36   (  70.08,  62.48) 05/09/2023   07:35:00  (  70.10,  62.53)    2.67                24
 05/09/2023   08:25:18   ( -70.00,-130.07) 05/09/2023   08:24:30  ( -69.99,-130.00)    3.06                48
 05/11/2023   23:00:47   ( -70.17,  10.80) 05/11/2023   23:01:57  ( -70.16,  10.87)    2.56                70
 05/11/2023   23:51:31   (  70.05, 178.29) 05/11/2023   23:51:24  (  70.05, 178.35)    2.52                 7
 05/12/2023   00:42:09   ( -69.75, -13.94) 05/12/2023   00:40:56  ( -69.83, -14.32)   17.16                73
 05/14/2023   15:17:42   ( -70.09, 126.69) 05/14/2023   15:18:22  ( -70.09, 126.66)    1.22                40
 05/14/2023   16:08:26   (  69.97, -65.83) 05/14/2023   16:07:49  (  69.98, -65.85)    1.27                37