DTR is based on Northern Hemisphere.For Southern Hemisphere,just change"South"to"North";Azimuth and Hour-Angle are defined by"Meridian plane and counterclockwise",to make all calculation with positive values.For square grid and rectangular grid are depends on boundary conditions and no need to force the rectangulargrid change to square grid;Assuming Fig.b is the complete design at certain location.The distance is1and the diagonal line is D1;For checkerboard grid(Fig.c),D2is the limitation(not E-W or S-N distance)and D2at least equal to D1.Sothe land usage for this arrangement=sin45x sin45x2+1=2,double the land;For honeycomb grid,E-W distance is the limitation and at least equal to The same E-W distance of rectangulargrid.The land usage=(cos30x2+cos30xsin30x2)x3/6=1.299,also30%larger land usage.
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机译：具有附加功能的在线房屋贷款比较计算器，允许用户确定将太阳能光伏系统的成本增加到原始房屋贷款金额中的净效果。 Solar Home Loan Calculator允许用户将2种不同的贷款金额与2种不同或相等的利率进行比较，以贷款支付的形式显示净损失或收益。该计算器还允许用户以美元为单位输入由太阳能光伏系统产生的节电，作为额外的贷款还款，说明整体房屋贷款应付利息，贷款期限和LVR减少。
