Simultaneous Nadir Overpasses (SNOs) between NOAA-21 and LANDSAT-9
TLE Epoch: 2023 6 4.  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)
 06/04/2023   23:00:53   (  70.16,-169.25) 06/04/2023   23:01:57  (  70.15,-169.22)    1.61                64
 06/04/2023   23:51:34   ( -70.03,  -1.73) 06/04/2023   23:51:27  ( -70.04,  -1.75)    1.46                 7
 06/05/2023   00:42:11   (  69.53, 166.32) 06/05/2023   00:41:00  (  69.60, 165.30)   40.25                71
 06/07/2023   15:17:47   (  70.10, -53.40) 06/07/2023   15:18:26  (  70.08, -53.44)    3.31                39
 06/07/2023   16:08:29   ( -70.02, 114.05) 06/07/2023   16:07:55  ( -70.02, 114.11)    2.21                34
 06/10/2023   06:44:08   ( -70.80,-106.04) 06/10/2023   06:45:16  ( -70.69,-104.31)   64.25                68
 06/10/2023   07:34:40   (  70.05,  62.45) 06/10/2023   07:34:53  (  70.04,  62.38)    3.35                13
 06/10/2023   08:25:22   ( -69.96,-130.10) 06/10/2023   08:24:22  ( -69.98,-130.07)    2.54                60
 06/12/2023   23:00:50   ( -70.12,  10.81) 06/12/2023   23:01:53  ( -70.14,  10.76)    2.99                63
 06/12/2023   23:51:34   (  70.01, 178.29) 06/12/2023   23:51:20  (  70.02, 178.24)    2.57                14
 06/13/2023   00:42:08   ( -69.49, -13.63) 06/13/2023   00:40:57  ( -69.53, -14.80)   45.73                71
 06/15/2023   15:17:45   ( -70.13, 126.56) 06/15/2023   15:18:20  ( -70.11, 126.59)    2.63                35
 06/15/2023   16:08:28   (  69.97, -65.88) 06/15/2023   16:07:47  (  69.99, -65.93)    2.81                41