Simultaneous Nadir Overpasses (SNOs) between NPP and TERRA
TLE Epoch: 2021 5 12.  Predictions up to the next  14.0 days:

     Date     Time(NPP) NPP Lat/Lon Date Time(TERRA) TERRA Lat/Lon    Distance(km)  Time Diff(sec)
 05/13/2021   17:31:09   ( -68.93,  95.01) 05/13/2021   17:32:21  ( -68.82,  95.65)   28.42                72
 05/13/2021   18:21:47   (  68.49, -97.09) 05/13/2021   18:21:52  (  68.49, -97.11)    1.18                 5
 05/13/2021   19:12:29   ( -68.40,  70.35) 05/13/2021   19:11:22  ( -68.38,  70.39)    2.76                67
 05/16/2021   09:47:59   ( -68.59,-148.76) 05/16/2021   09:48:51  ( -68.56,-148.79)    2.73                52
 05/16/2021   10:38:43   (  68.47,  18.70) 05/16/2021   10:38:18  (  68.45,  18.72)    2.04                25
 05/16/2021   11:29:10   ( -67.57,-172.85) 05/16/2021   11:28:01  ( -67.62,-174.62)   75.12                69
 05/19/2021   01:14:28   (  69.41, 158.55) 05/19/2021   01:15:36  (  69.29, 160.38)   73.01                68
 05/19/2021   02:04:55   ( -68.51, -32.90) 05/19/2021   02:05:18  ( -68.52, -32.96)    2.52                23
 05/19/2021   02:55:39   (  68.40, 134.56) 05/19/2021   02:54:45  (  68.40, 134.54)    1.02                54
 05/21/2021   17:31:11   (  68.65, -84.63) 05/21/2021   17:32:14  (  68.63, -84.58)    2.84                63
 05/21/2021   18:21:52   ( -68.49,  82.89) 05/21/2021   18:21:45  ( -68.47,  82.86)    2.38                 7
 05/21/2021   19:12:29   (  68.00,-109.17) 05/21/2021   19:11:17  (  68.07,-109.97)   33.91                72
 05/24/2021   09:48:07   (  68.58,  31.22) 05/24/2021   09:48:41  (  68.57,  31.23)    0.83                34
 05/24/2021   10:38:48   ( -68.42,-161.26) 05/24/2021   10:38:12  ( -68.42,-161.32)    2.60                36