一个MATLAB函数来计算任何地球上任何轨道的高度。
Form:
% h = Altitude( r, f, a, units )
% ------
% Inputs
% ------
% r (3,:) ECI position vectors (units)
% f (1,1) Flattening factor
% a (1,1) Equatorial radius
% units
SHOW FULL COLUMNS FROM `jrk_downrecords` [ RunTime:0.002880s ]
SELECT `a`.`aid`,`a`.`title`,`a`.`create_time`,`m`.`username` FROM `jrk_downrecords` `a` INNER JOIN `jrk_member` `m` ON `a`.`uid`=`m`.`id` WHERE `a`.`status` = 1 GROUP BY `a`.`aid` ORDER BY `a`.`create_time` DESC LIMIT 10 [ RunTime:0.090054s ]
SHOW FULL COLUMNS FROM `jrk_tagrecords` [ RunTime:0.000891s ]
SELECT * FROM `jrk_tagrecords` WHERE `status` = 1 ORDER BY `num` DESC LIMIT 20 [ RunTime:0.001115s ]
SHOW FULL COLUMNS FROM `jrk_member` [ RunTime:0.000974s ]
SELECT `id`,`username`,`userhead`,`usertime` FROM `jrk_member` WHERE `status` = 1 ORDER BY `usertime` DESC LIMIT 10 [ RunTime:0.003185s ]
SHOW FULL COLUMNS FROM `jrk_searchrecords` [ RunTime:0.000871s ]
SELECT * FROM `jrk_searchrecords` WHERE `status` = 1 ORDER BY `num` DESC LIMIT 5 [ RunTime:0.003982s ]
SELECT aid,title,count(aid) as c FROM `jrk_downrecords` GROUP BY `aid` ORDER BY `c` DESC LIMIT 10 [ RunTime:0.019856s ]
SHOW FULL COLUMNS FROM `jrk_articles` [ RunTime:0.017192s ]
UPDATE `jrk_articles` SET `hits` = 2 WHERE `id` = 29959 [ RunTime:0.036244s ]
