Data collected daily along the ship track in JGOFS format from ARSV Laurence M. Gould and RVIB Nathaniel B. Palmer cruises to the Southern Ocean from 2001-2003 as part of the Southern Ocean GLOBEC project.

<h3>Environmental and Navigational Data from the Ship's Monitoring Systems,<br />
Reported along the Ship's Track</h3>

<p>This along track (JGOFS) data set was obtained primarily by applying calibrations to raw data and decimating to whole minute intervals. Several fields are derived measurements from more than an single raw input. For example, Course Made Good (cmg) and Speed Over Ground (sog) are calculated from gyro and GPS inputs.</p>

<p>Cruises often used \"9.99\" or \"9999\" to indicate bad data. Those numbers were changed to 'nd'. Not all bad data were flagged in this way however. Users of these data are encouraged to read the Data Report (found at the Directory Level of this system under \"Inventory\" then under \"project/cruise id\", and then under \"data report\") in order to be aware of bad data points that are not indicated by \"9\"s and therefore remain in the dataset.</p>

<p><strong>Questions regarding this data set should be directed to:</strong><br />
Bob Groman<br />
GLOBEC Data Management Office<br />
Woods Hole Oceanographic Inst.<br />
Woods Hole, MA 02543<br />
<br />
Phone: [phone]<br />
E-mail: <a href=\"mailto:[e-mail]\">[e-mail]</a><br />
<br />
<em>Last updated March 15, 2006</em></p>

<h3>沿船舶航行轨迹记录的船舶监测系统环境与导航数据</h3>

<p>本次沿轨（Joint Global Ocean Flux Study，缩写JGOFS）数据集主要通过对原始数据进行校准，并降采样至整分钟间隔后生成。数据集内多个字段为多源原始输入衍生的测量值。例如，推算航迹向（Course Made Good，缩写cmg）与对地航速（Speed Over Ground，缩写sog）即由陀螺罗经（gyro）与全球定位系统（Global Positioning System，缩写GPS）输入数据计算得到。</p>

<p>本数据集所属航次通常使用"9.99"或"9999"标记无效数据，现已将此类数值替换为"nd"。但并非所有无效数据均采用此方式标记。建议数据使用者查阅本系统目录层级下的《数据报告》（依次进入"Inventory"→"project/cruise id"→"data report"路径），以识别未以"9"类数值标记、仍留存于数据集中的无效数据点。</p>

<p><strong>若对本数据集有任何疑问，请联系：</strong><br />
鲍勃·格罗曼（Bob Groman）<br />
全球海洋生态系统动力学研究（Global Ocean Ecosystem Dynamics，缩写GLOBEC）数据管理办公室<br />
伍兹霍尔海洋研究所（Woods Hole Oceanographic Institution）<br />
美国马萨诸塞州伍兹霍尔，邮编02543<br />
<br />
电话：508 548 1400<br />
电子邮箱：<a href="mailto:[e-mail]">[e-mail]</a><br />
<br />
<em>最后更新于2006年3月15日</em></p>