Site Studies of Infrared Observations with the TAO 6.5m Telescope

为了对智利北部地区的云量和水汽进行卫星研究，我们选择了海拔5600m的Co. Chajnantor作为安装TAO（东京大学阿塔卡马天文台）6.5m红外望远镜的候选地点。然而，利用卫星从空间观测地面附近的当地天气情况是不可行的，因为这与从空间观测到的情况有很大不同。因此，现场监测天气和证明Chajnantor山顶是TAO望远镜的理想地点是至关重要的。在本次研究中，我们在山顶安装了标准的气象测量杆、视物监测器和云监测器，测量了近地云、视物、风速等天文观测性能的重要指标。我们做了：1；在2005年以前，利用云台、气象监测杆和观测仪在海拔5000m的高空进行了气象观测。我们于2006年开辟了一条从5000米山脚到5600米山顶的运输人员、仪器和其他物资的通道。3 . 2006年，云监测器、气象监控杆和视物监控仪被运至山顶，在山顶开始了测量工作。对这样获得的数据进行了分析。我们已经做了一些只能在这个海拔5600米的地方进行的科学研究。结果如下：峰顶测得的云量与5000m高度测得的云量相同，5600m高度的风速在望远镜操作的可容忍范围内。在峰顶测量得到了0.4弧秒的惊人值，尽管如此，测量是在容易发生空气湍流的地方进行的。在这里，我们得出结论，它已被证明，Co. Chainantor的顶峰是世界上最好的红外线天文观测地点之一，因此是TAO 6.5米望远镜的一个地点。本研究的目的已经达到。少

Carrying out a satellite study of cloud cover and water vapor in northern Chile, we have selected Co. Chajnantor at an altitude of 5600m as a candidate site where TAO (university of Tokyo Atacama Observatory) 6.5m infrared telescope be installed. However, it is not feasible to observe, with satellites from space, the local weather conditions near the surface of the ground which would seriously differ from those observed from space. Thus it is vital to monitor the weather on site and to prove that the summit of Co. Chajnantor is an ideal site for the TAO telescope. In this research study, we have installed a standard weather measuring pole, seeing monitor, and cloud monitors on the summit, and measured clouds near the ground, seeing, wind velocities, etc., on which performance in astronomical observation should seriously depend.We have made :1.The weather conditions were measured with the cloud monitors, the weather monitoring pole, and the seeing monitor which were in stalled at an alt … More itude of 5000m until 2005.2.We have opened up a path to which is used to transport, from the mountain foot at 5000m to the summit at 5600m, personnel, instrument, and other materials in 2006.3.The cloud monitors, the weather monitoring pole, and the seeing monitor were transported to the summit in 2006, and the measurements started on the summit.4.The data thus acquired were analyzed.5.We have made some study related to the science which can only be carried out on this 5600m altitude site.The results are as follows. Cloud cover measured on the summit is the same as that measured at a 5000m altitude, and wind velocity at a 5600m altitude is within a tolerable range for telescope operation. Seeing measured on the summit has recorded a splendid value of 0.4 arcsec, nonetheless the measurements were made at a point where air turbulence is apt to occur. Here we conclude that it has been proven that the summit of Co. Chainantor is one of the world-best places for infrared astronomy, and thus for a site of the TAO 6.5m telescope. The goal of this study has been achieved. Less