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地物光谱仪测量注意事项
<p style="margin: 0pt; line-height: 1.75em;"><span style="color: rgb(0, 0, 0); line-height: 150%; font-family: Calibri; font-size: 11pt; mso-spacerun: &quot;yes&quot;; mso-fareast-font-family: 宋体; mso-bidi-font-family: &quot;Times New Roman&quot;; mso-font-kerning: 1.0000pt;">地物光谱仪的测量事项有哪些?莱森光学来给大家介绍一下:</span></p><p style="margin: 0pt; line-height: 1.75em;"><span style="color: rgb(0, 0, 0); line-height: 150%; font-family: Calibri; font-size: 11pt; mso-spacerun: &quot;yes&quot;; mso-fareast-font-family: 宋体; mso-bidi-font-family: &quot;Times New Roman&quot;; mso-font-kerning: 1.0000pt;">1.<span style="color: rgb(0, 0, 0); line-height: 150%; font-family: 宋体; font-size: 11pt; mso-spacerun: &quot;yes&quot;; mso-fareast-font-family: 宋体; mso-bidi-font-family: &quot;Times New Roman&quot;; mso-font-kerning: 1.0000pt;">仪器的位置:仪器向下正对着被测物体,至少保持与水平面的法线夹角在</span>±10°<span style="color: rgb(0, 0, 0); line-height: 150%; font-family: 宋体; font-size: 11pt; mso-spacerun: &quot;yes&quot;; mso-fareast-font-family: 宋体; mso-bidi-font-family: &quot;Times New Roman&quot;; mso-font-kerning: 1.0000pt;">之内,保持一定的距离,探头距离地面高度通常在</span>1.3m<span style="color: rgb(0, 0, 0); line-height: 150%; font-family: 宋体; font-size: 11pt; mso-spacerun: &quot;yes&quot;; mso-fareast-font-family: 宋体; mso-bidi-font-family: &quot;Times New Roman&quot;; mso-font-kerning: 1.0000pt;">,以便获取平均光谱。视域范围可以根据相对高度和视场角计算。如果有多个探头可选,则在野外尽量选择宽视域探头。测量植物冠层光谱时,注意测量最具代表性的物种。</span></span></p><p style="margin: 0pt; text-align: center; line-height: 1.75em;"><span style="color: rgb(0, 0, 0); line-height: 150%; font-family: Calibri; font-size: 11pt; mso-spacerun: &quot;yes&quot;; mso-fareast-font-family: 宋体; mso-bidi-font-family: &quot;Times New Roman&quot;; mso-font-kerning: 1.0000pt;">&nbsp;<img title="1621825530178183.png" alt="图片1.png" src="/uploads/image/20210524/1621825530178183.png"/></span></p><p style="margin: 0pt; line-height: 1.75em;"><span style="color: rgb(0, 0, 0); line-height: 150%; font-family: Calibri; font-size: 11pt; mso-spacerun: &quot;yes&quot;; mso-fareast-font-family: 宋体; mso-bidi-font-family: &quot;Times New Roman&quot;; mso-font-kerning: 1.0000pt;">2.<span style="color: rgb(0, 0, 0); line-height: 150%; font-family: 宋体; font-size: 11pt; mso-spacerun: &quot;yes&quot;; mso-fareast-font-family: 宋体; mso-bidi-font-family: &quot;Times New Roman&quot;; mso-font-kerning: 1.0000pt;">传感器探头的选择:当野外地物范围比较大,物种纯度比较高、观测距离比较近时,选用较大视场角的探头;当地物分布面积较小时,或者物种在近距离内比较混杂,或需要测量远处地物时,则选用小视场角的探头。</span></span></p><p style="margin: 0pt; line-height: 1.75em;"><span style="color: rgb(0, 0, 0); line-height: 150%; font-family: Calibri; font-size: 11pt; mso-spacerun: &quot;yes&quot;; mso-fareast-font-family: 宋体; mso-bidi-font-family: &quot;Times New Roman&quot;; mso-font-kerning: 1.0000pt;">&nbsp;</span></p><p style="margin: 0pt; line-height: 1.75em;"><span style="color: rgb(0, 0, 0); line-height: 150%; font-family: Calibri; font-size: 11pt; mso-spacerun: &quot;yes&quot;; mso-fareast-font-family: 宋体; mso-bidi-font-family: &quot;Times New Roman&quot;; mso-font-kerning: 1.0000pt;">3.<span style="color: rgb(0, 0, 0); line-height: 150%; font-family: 宋体; font-size: 11pt; mso-spacerun: &quot;yes&quot;; mso-fareast-font-family: 宋体; mso-bidi-font-family: &quot;Times New Roman&quot;; mso-font-kerning: 1.0000pt;">避免阴影:探头定位时必须避免阴影,人应该面向阳光,这样可以得到一致的测量结果。野外大范围测试光谱数据时,需要沿着阴影的反方向布置测点。当阴影不可避免时,使用参考白板校正时应注意遮荫。</span></span></p><p style="margin: 0pt; line-height: 1.75em;"><span style="color: rgb(0, 0, 0); line-height: 150%; font-family: Calibri; font-size: 11pt; mso-spacerun: &quot;yes&quot;; mso-fareast-font-family: 宋体; mso-bidi-font-family: &quot;Times New Roman&quot;; mso-font-kerning: 1.0000pt;">&nbsp;</span></p><p style="margin: 0pt; line-height: 1.75em;"><span style="color: rgb(0, 0, 0); line-height: 150%; font-family: Calibri; font-size: 11pt; mso-spacerun: &quot;yes&quot;; mso-fareast-font-family: 宋体; mso-bidi-font-family: &quot;Times New Roman&quot;; mso-font-kerning: 1.0000pt;">&nbsp;4.<span style="color: rgb(0, 0, 0); line-height: 150%; font-family: 宋体; font-size: 11pt; mso-spacerun: &quot;yes&quot;; mso-fareast-font-family: 宋体; mso-bidi-font-family: &quot;Times New Roman&quot;; mso-font-kerning: 1.0000pt;">白板反射校正:天气较好时每隔几分钟就要用白板校正</span>1<span style="color: rgb(0, 0, 0); line-height: 150%; font-family: 宋体; font-size: 11pt; mso-spacerun: &quot;yes&quot;; mso-fareast-font-family: 宋体; mso-bidi-font-family: &quot;Times New Roman&quot;; mso-font-kerning: 1.0000pt;">次,防止传感器响应系统的漂移和太阳入射角的变化影响,如果天气较差,校正应更频繁。校正时白板应放置水平。</span></span></p><p style="margin: 0pt; line-height: 1.75em;"><span style="color: rgb(0, 0, 0); line-height: 150%; font-family: Calibri; font-size: 11pt; mso-spacerun: &quot;yes&quot;; mso-fareast-font-family: 宋体; mso-bidi-font-family: &quot;Times New Roman&quot;; mso-font-kerning: 1.0000pt;">&nbsp;</span></p><p style="margin: 0pt; line-height: 1.75em;"><span style="color: rgb(0, 0, 0); line-height: 150%; font-family: Calibri; font-size: 11pt; mso-spacerun: &quot;yes&quot;; mso-fareast-font-family: 宋体; mso-bidi-font-family: &quot;Times New Roman&quot;; mso-font-kerning: 1.0000pt;">5.<span style="color: rgb(0, 0, 0); line-height: 150%; font-family: 宋体; font-size: 11pt; mso-spacerun: &quot;yes&quot;; mso-fareast-font-family: 宋体; mso-bidi-font-family: &quot;Times New Roman&quot;; mso-font-kerning: 1.0000pt;">防止光背景污染:测量植被时,应注意植物覆盖面积。当覆盖率较低时,应考虑记录土壤光谱数据。不要穿带浅色、特色衣帽,如果穿戴白色、亮红色、黄色、绿色、蓝色的衣帽,就会改变反射物体的反射光谱特征。要注意避免自身阴影落在目标物上。当使用翻斗卡车或其他平台从高处测量地物目标时,要注意避免金属反光,如果有,则需要用黑布包住反光部位。</span></span></p><p style="margin: 0pt; line-height: 1.75em;"><span style="color: rgb(0, 0, 0); line-height: 150%; font-family: Calibri; font-size: 11pt; mso-spacerun: &quot;yes&quot;; mso-fareast-font-family: 宋体; mso-bidi-font-family: &quot;Times New Roman&quot;; mso-font-kerning: 1.0000pt;">&nbsp;</span></p><p style="margin: 0pt; line-height: 1.75em;"><span style="color: rgb(0, 0, 0); line-height: 150%; font-family: Calibri; font-size: 11pt; mso-spacerun: &quot;yes&quot;; mso-fareast-font-family: 宋体; mso-bidi-font-family: &quot;Times New Roman&quot;; mso-font-kerning: 1.0000pt;">6.<span style="color: rgb(0, 0, 0); line-height: 150%; font-family: 宋体; font-size: 11pt; mso-spacerun: &quot;yes&quot;; mso-fareast-font-family: 宋体; mso-bidi-font-family: &quot;Times New Roman&quot;; mso-font-kerning: 1.0000pt;">观测时间和频度:光谱测试应在</span>10<span style="color: rgb(0, 0, 0); line-height: 150%; font-family: 宋体; font-size: 11pt; mso-spacerun: &quot;yes&quot;; mso-fareast-font-family: 宋体; mso-bidi-font-family: &quot;Times New Roman&quot;; mso-font-kerning: 1.0000pt;">~</span>14<span style="color: rgb(0, 0, 0); line-height: 150%; font-family: 宋体; font-size: 11pt; mso-spacerun: &quot;yes&quot;; mso-fareast-font-family: 宋体; mso-bidi-font-family: &quot;Times New Roman&quot;; mso-font-kerning: 1.0000pt;">时之间完成,并在无云晴朗的天空下进行,尽量避免过早或过晚。在时间许可时,尽量多测一些光谱。每个测点测试</span>5<span style="color: rgb(0, 0, 0); line-height: 150%; font-family: 宋体; font-size: 11pt; mso-spacerun: &quot;yes&quot;; mso-fareast-font-family: 宋体; mso-bidi-font-family: &quot;Times New Roman&quot;; mso-font-kerning: 1.0000pt;">个数据,以求平均值,降低噪声和随机性。进行水体测量时,测量数据应至少跨越一个波浪周期。</span></span></p><p style="margin: 0pt; line-height: 1.75em;"><span style="color: rgb(0, 0, 0); line-height: 150%; font-family: Calibri; font-size: 11pt; mso-spacerun: &quot;yes&quot;; mso-fareast-font-family: 宋体; mso-bidi-font-family: &quot;Times New Roman&quot;; mso-font-kerning: 1.0000pt;">&nbsp;</span></p><p style="margin: 0pt; line-height: 1.75em;"><span style="color: rgb(0, 0, 0); line-height: 150%; font-family: Calibri; font-size: 11pt; mso-spacerun: &quot;yes&quot;; mso-fareast-font-family: 宋体; mso-bidi-font-family: &quot;Times New Roman&quot;; mso-font-kerning: 1.0000pt;">7.<span style="color: rgb(0, 0, 0); line-height: 150%; font-family: 宋体; font-size: 11pt; mso-spacerun: &quot;yes&quot;; mso-fareast-font-family: 宋体; mso-bidi-font-family: &quot;Times New Roman&quot;; mso-font-kerning: 1.0000pt;">采集辅助数据:在所有的测试地点必须采集</span>GPS<span style="color: rgb(0, 0, 0); line-height: 150%; font-family: 宋体; font-size: 11pt; mso-spacerun: &quot;yes&quot;; mso-fareast-font-family: 宋体; mso-bidi-font-family: &quot;Times New Roman&quot;; mso-font-kerning: 1.0000pt;">数据,详细记录测点的位置、植被覆盖度、类型以及异常条件、探头的高度,配以野外照相记录,便于后续的解译分析。</span></span></p><p style="margin: 0pt; line-height: 1.75em;"><span style="color: rgb(0, 0, 0); line-height: 150%; font-family: Calibri; font-size: 11pt; mso-spacerun: &quot;yes&quot;; mso-fareast-font-family: 宋体; mso-bidi-font-family: &quot;Times New Roman&quot;; mso-font-kerning: 1.0000pt;">&nbsp;</span></p><p style="margin: 0pt; line-height: 1.75em;"><span style="color: rgb(0, 0, 0); line-height: 150%; font-family: Calibri; font-size: 11pt; mso-spacerun: &quot;yes&quot;; mso-fareast-font-family: 宋体; mso-bidi-font-family: &quot;Times New Roman&quot;; mso-font-kerning: 1.0000pt;"><span style="color: rgb(0, 0, 0); font-family: 宋体;">莱森光学提供各种型号的手持式</span>/<span style="color: rgb(0, 0, 0); font-family: 宋体;">便携式地物光谱仪,可点击</span>www.lisenoptics.cn<span style="color: rgb(0, 0, 0); font-family: 宋体;">了解更多地物光谱仪资讯与产品。</span></span></p><p></p>
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