1030:一张不清晰的自拍
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后方是蔚蓝的星球,后方是漆黑无尽宇宙。最新地址ltxsba.info
发射之前,技术人员曾咨询过叶青,问这颗通讯卫星叫什么名字。
叶青心里有了名字,但叶青希望等它发射成功后,再公布出来。
现在看来,距离成功已经走完了80%的路程。
卫星以第一宇宙速,向最终的轨道飞去。接着是减速工作,宇宙没有重力,通常在前进上花费多少能量,就要用相同的能量来把速度降低为零。
“信号正常。”
“远程监视雷达和测高雷达,跟踪正常。”
“三十分钟后减速完成,尝试进入轨道。”
显示墙上,不停有一道道叶青看不懂的数据闪过。
听着技术人员汇报,这一切,出乎意料地正常。
半小时等待变得极其漫长,以至于当总指挥陈方利拍了拍叶青肩膀,告诉叶青卫星已经成功入轨后,叶青还有些没反应过来。
“叶先生,这次入轨极为顺利。卫星从启动助推器,到调整姿态,利用反向推力减速至零,整套动作一气呵成,没有任何多余的二次微调动作。”
“这颗卫星的推进系统很出色呀。”
“这说明我们国产工业技术,正在大幅进步,并在航天航空事业里取得了傲人成就。”叶青故作轻松地笑了笑。
卫星推进系统,是从航天中心配套的科研工厂那边购买而来。这里面固然有巨兽工业调校出色的缘故,可控制软件再强,也要硬件过关才行。
“成功已经走完了90%,我对剩下10%稳操胜券。”总指挥陈方利顺手夸了夸巨兽工业。
说完,总指挥陈方利转过头对话筒喊道:“进入太阳能帆板展开程序。”
“是~”指挥员下达命令,“各部门注意,太阳能帆板将在一分钟后展开。”
“卫星感应器正常。”
“主无线电收发射机正常。”
“蓄能电池循环正常。”
“帆板需调整到负27%角,手动介入纠正随时准备。”
“准备完毕,展开帆板。”
“是!”
一道肉眼看不见的电磁波,以光速从航空中心的发射站出发。零点一三秒后,电磁波抵达卫星的位置。
卫星无线电接收器接收到信号,信号通过多道加密芯片验证后,控制程序自动执行信号中的命令。
展开太阳能帆板,是卫星进入轨道后,最后一道,也是最容易出现意外的程序。
卫星在执行任务中需要大量电能,以巨兽工业这颗通讯卫星为例,至少需要十平方米面积的太阳能帆板,提供上千瓦的能源供应,才能满足要求。
没有能源的卫星只能是太空垃圾,为了能源,卫星就必须拥有面积巨大的太阳能帆板,并保证太阳能帆板的一面,始终朝向太阳。
卫星运载舱面积有限,这也就要求卫星上天前,必须把帆板收拢在一起。
所以卫星的太阳能帆板,都是用弹簧约束机构,固定在卫星两侧,并用火工机构将其锁死。
运载火箭的每一克载重都极其宝贵,卫星只能采用重量最低的一次性展开方案,来把帆板展开,展开后帆板失去收拢能力。
同样,卫星也只有一次展开帆板的机会,失败就变成盒子。
每个航天大国,都有太阳能帆板展开失败的例子。
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