celestial parallel,circle of equal declination,parallel of declination

3977,then,the match relations between sunrise and sunset hour angles will not alter with the solar declination.

若坡面的坡向β和纬度φ满足条件|sinβcosφ|≥sin23°26,′则坡面日出日没时角的配置关系不随太阳赤纬的变化而变化;反之,则存在两个绝对值相等、符号相反的一般临界赤纬δc,以-δc、δc为界,坡面日出日没时角的配置关系具有三种不同的形式。

Based on the studies of the tidal stress actions on seismic faults,the lunar-solar declinations and ecliptic-longitude differences for strong and moderate-strong triggered by tidal stress are calculated.

在进行潮汐应力对发震断层作用研究的基础上 ,对云南、四川两区域受到潮汐应力触发作用的强震和中强震发震时的月日赤纬及黄经差进行了计算 ,得到了其分布图象。