Site Studies of Infrared Observations with the TAO 6.5m Telescope

为了对智利北部的云层和水汽进行卫星研究，我们选择了海拔5600米的Chajnantor公司作为安装TAO(东京大学阿塔卡马天文台)6.5米红外望远镜的候选地点。然而，利用空间卫星观测地面附近的当地天气状况是不可行的，因为这种天气状况将与从太空观测到的天气状况有很大不同。因此，监测现场的天气情况并证明查南托山顶是放置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天气测量杆、视宁度监测器和云监测器，并测量了近地面的云量、视宁度、风速等天文观测的重要依据。我们做了以下几方面的工作：1.利用ALT…停机的云监测器、天气监控杆和视宁仪测量天气状况2006年，我们开辟了一条从5000米山脚到5600米山顶运送人员、仪器和其他物资的通道。2006年，云监测仪、天气监测杆和视宁仪被运送到山顶，并在夏季开始测量。4.对所获得的数据进行了分析。5.我们进行了一些科学研究，这些研究只能在海拔5600米的山顶上进行。在山顶测得的云量与在5000米高度测得的云量相同，5600米高度的风速在望远镜运行的容许范围内。在山顶上测量的视宁度记录了0.4角秒的绝佳数值，尽管如此，测量是在空气湍流容易发生的点进行的。在这里，我们得出的结论是，已经证明，Chainantor公司的山顶是世界上红外天文的最佳地点之一，因此对于TAO 6.5米望远镜的一个地点来说也是如此。本研究的目的已经达到。较少

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