Simultaneous Nadir Overpasses (SNOs) between NOAA-21 and TERRA
TLE Epoch: 2023 12 6.  Predictions up to the next  14.0 days:

     Date     Time(NOAA-21) NOAA-21 Lat/Lon Date Time(TERRA) TERRA Lat/Lon    Distance(km)  Time Diff(sec)
 12/07/2023   03:47:00   ( -71.95, -63.87) 12/07/2023   03:48:08  ( -71.85, -62.09)   62.54                68
 12/07/2023   04:37:33   (  71.28, 104.65) 12/07/2023   04:37:39  (  71.31, 104.68)    3.38                 6
 12/07/2023   05:28:15   ( -71.18, -87.86) 12/07/2023   05:27:04  ( -71.18, -87.87)    0.57                71
 12/09/2023   16:40:43   ( -71.32, 103.79) 12/09/2023   16:41:05  ( -71.29, 103.76)    2.85                22
 12/09/2023   17:31:27   (  71.21, -88.72) 12/09/2023   17:30:27  (  71.23, -88.67)    2.79                60
 12/12/2023   04:43:55   (  71.31, 103.00) 12/12/2023   04:44:29  (  71.32, 102.92)    2.88                34
 12/12/2023   05:34:38   ( -71.26, -89.59) 12/12/2023   05:33:53  ( -71.24, -89.54)    2.80                45
 12/14/2023   16:47:06   ( -71.36, 102.12) 12/14/2023   16:47:54  ( -71.35, 102.09)    1.86                48
 12/14/2023   17:37:50   (  71.27, -90.40) 12/14/2023   17:37:16  (  71.29, -90.35)    3.25                34
 12/17/2023   04:50:18   (  71.38, 101.29) 12/17/2023   04:51:17  (  71.37, 101.24)    2.33                59
 12/17/2023   05:41:00   ( -71.28, -91.21) 12/17/2023   05:40:41  ( -71.29, -91.23)    1.83                19
 12/19/2023   16:53:29   ( -71.45, 100.38) 12/19/2023   16:54:40  ( -71.45, 100.48)    3.68                71
 12/19/2023   17:44:12   (  71.30, -92.05) 12/19/2023   17:44:03  (  71.33, -92.04)    2.98                 9