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GEOPoint 3.05

Windows 007 0评论

™ Registered trademark.

3.05 | 10 Mb
GEOPoint is an easy to use satellite antenna pointing calculator, for geostationary communications satellites. It calculates the azimuth and elevation pointing angles from a given location on the earth towards a specified geostationary satellite. The program also calculates polarisation tilt angles, estimates dates and times of annual sun-outage events, calculates antenna G/T, eirp and frequency stability, and estimates path-loss and rain-attenuation based on ITU-R climate models. As used by Hausfeld Consulting for satellite communications planning.

Anyone may download and install GEOPoint to access the basic features free of charge.
Registration and payment are only required to unlock the Advanced features of the program.

Basic Features (Free)

an easy to use dialog-style user interface for data entry and calculation;
entry of earth station location coordinates directly, or by clicking on a world map;
select earth station location from a built-in list of world major cities;
display of satellite elevation contours on the world map to aid in site selection;
entry of latitude and longitude coordinates in d,m,s format, or as decimal degrees;
calculation of pointing angles to a specified satellite for common types of antenna mount;
display of azimuth pointing angles relative to True North, and relative to local magnetic north;
estimation of antenna movement limits for inclined orbit satellites;
calculation of polarisation tilt angle, loop-back path delay, and required antenna tracking speeds;
estimation of the peak dates and times for sun-interference on the receive link.
Output of a summary report in HTML format.
(see screen shots) (see sample Summary Report)

Advanced Features (requires Registration)

ability to zoom the world map one level for more accurate site selection;
ability to save the current map image to file.
estimation of site altitude from ITU-R world topography model;
select earth station location from a user supplied file containing a list of sites;
view and save a diagram of the GEO Arc visible from the site;
labelling of individual satellites and plotting local horizon and antenna movement limits;
plotting of satellite locations from Norad two-line element or Intelsat ephemeris format orbit data;
display of ITU-R Climate Model data for the specified earth station location;
estimate antenna G/T from user inputs of antenna parameters and frequency;
calculate path loss between the earth station and satellite at a specified frequency using ITU-R propagation models;
estimate the impact of satellite motion on EIRP and frequency stability;
output a batch report of pointing angles from the site, for a list of user selected satellites;
output a detailed report of sun interference dates and times for given receive antenna parameters;
output a detailed report of rain attenuation loss for a range of frequencies and link availability;
output a batch summary report for a list of earth station sites.
(see more detail on Advanced features)

NOTE: Registered users of GEOPoint also gain access to the Advanced features of our GreatCirc program at no extra charge. Simply enter your GEOPoint registration code into GreatCirc.

Home Page - http://www.gunamoi.com.au/soft/geopoint/index.html

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  1. GeoPoint对象是一款易于使用的用于地球同步通信卫星的卫星天线指向计算器。根据地球上的给定位置计算出朝向指定对地静止卫星的方位角和俯仰指向角。 该程序还可以计算极化倾角,估算日期和年度太阳停运活动的时间,计算出天线G/T,EIRP值和频率稳定性,并算计路径损耗,以及基于ITU-R气候模式的降雨衰减。如同Hausfeld咨询公司实施卫星通信计划使用的方法一样。 任何人都可以下载和安装GeoPoint以获得免费的基本功能。 只对解锁程序的高级功能才需要注册和付费。 基本功能(免费) 易于使用的对话式用户界面,用于数据输入和计算; 直接或通过点击世界地图来输入地面站的位置坐标; 从内置的世界各大城市列表中选择地面站的位置; 在世界地图上显示卫星等高线以便帮助选址; 经度和纬度坐标按照D,M,S格式或以十进制角度输入; 对于常见的天线安装类型,计算指定卫星天线的指向角; 显示方位指向的角度即可以相对于地轴北极又可以相对于当地的磁北极; 估算倾斜轨道卫星天线的移动范围; 计算极化倾角、环回路径延迟以及所需的天线跟踪速度; 估算接收链路上太阳干扰的峰值日期和时间。 输出HTML格式的总结报告(见截图以及总结报告样本)。 高级功能(需要注册) 为更精确地选址,能够将世界地图放大一个级别; 能够将当前地图保存到图像文件。 根据ITU-R全球地形模型估算站点海拔高度; 从用户提供的包含站点列表的文件中选择地面站的位置; 查看和保存来自站点的可见GEO弧线图; 对单个卫星和当地地平线以及天线移动范围绘制标签; 从诺拉德(Norad)双线元素或国际通信卫星组织星历格式的轨道数据中绘制卫星位置图; 对指定地面站位置显示ITU-R气候模型数据; 根据用户输入的天线参数和频率来估算天线G/T数据; 用ITU-R传播模型计算出特定频率下的地面站和卫星之间的路径损耗; 估算卫星运动对EIRP值和频率稳定性的影响; 为用户选择的卫星列表输出站点指向角的批量报告; 对于给定接收天线参数输出太阳干扰日期和时间的详细报告; 对于某个频率范围和可用链路输出雨衰损失的详细报告; 对于地面站点列表批量输出总结报告。 (参见高级功能的更多细节) 注:GeoPoint的注册用户还可以获得GreatCirc程序的高级功能而不收取额外费用,只需在GreatCirc程序中输入您的GeoPoint注册码。
    trans0day2年前 (2014-08-08)