BARREL 2X Data Processing Unit (HKPG) Analog Housekeeping Voltage, Temperature, Current, and Payload Status, Level 2, 40 s Data

Housekeeping voltage, temperature, current, and payload status values returned every 40 s. NOTE: The analog sensor data in these records are based on the nominal BARREL housekeeping layout. Some payloads may have small differences that are not reflected here. If there is specific sensor data that you need that looks questionable, please contact the BARREL team for clarification.

The BARREL Mission was a multiple-balloon investigation designed to study electron losses from Earth's Radiation Belts. Selected as a NASA Living with a Star Mission of Opportunity, BARREL was designed to augment the Radiation Belt Storm Probes, RBSP, mission by providing measurements of the spatial and temporal variations of electron precipitation from the radiation belts. The RBSP mission has since been renamed the Van Allen Probes mission. Each BARREL balloon carried an X-ray spectrometer to measure the bremsstrahlung X-rays produced by precipitating relativistic electrons as they collide with neutrals in the atmosphere, and a DC magnetometer to measure ULF-timescale variations of the magnetic field. BARREL observations collected near latitudes close to either the antarctic and arctic circles at stratospheric altitudes at about 30 km. The BARREL instrumentation provided the first balloon measurements of relativistic electron precipitation while comprehensive in situ measurements of both plasma waves and energetic particles were available. Also, the BARREL data has been used to characterize the spatial scale of precipitation at relativistic energies.

The initial pair of balloon campaigns that were conducted initially during the Austral summer months of January and February of 2013 and 2014 with launches from two stations located in Antarctica: the British base located at Halley Bay on the Brunt Ice Shelf and the South African SANAE IV base (SANAE stand for South African National Antarctic Expedition) located in Vesleskarvet, Queen Maud Land. For the 2013 and 2014 the balloon campaigns, the launch plan was designed to maintain an array with about five payloads spread across about six hours of magnetic local time, MLT, in the region that magnetically maps to the radiation belts. Thus, the BARREL balloon constellation constituted an evolving and slowly moving array able to study relativistic electron precipitation from the radiation belts.

Later campaigns were undertaken in 2015 and 2016 from the Esrange Space Center located in Kiruna, Sweden. The 2015 and 2016 campaigns were undertaken in coordination with the Van Allen Probes mission, the European Incoherent Scatter Scientific Association, EISCAT, incoherent scatter radar system, and other ground and space based instruments. Seven balloon launches occurred during the August 2015 BARREL campaign. A total of eight flights occurred during August 2016.

Summing over the four BARREL campaigns, over 50 small, approximately 20 kg, stratospheric balloons were successively launched. The website creeated and hosted by A.J. Halford (see Information URL below) reports that: "By the end of the campaigns, there were over 90 researchers coordinating on a daily basis with the BARREL team working on 7 different satellite missions, 1 other balloon mission, and way too many ground based instruments to count." Although the BARREL mission launched only balloons during the years from 2013 to 2016, research using data collected on these flights is ongoing, so stay tuned for updates! All data and analysis software are freely available to the scientific community.

The information listed above in this resource description was compiled by referencing several BARREL related resources including primarily the Millan et al. (2013) Space Science Reviews publication, the BARREL at Dartmouth mission web site, and the website maintained by A.J. Halford.

The current release of all BARREL CDF data products are Version 10 files.

BARREL will make all its scientific data products quickly and publicly available but all users are expected to read and follow the BARREL Data Usage Policy listed below.

BARREL Data Usage Policy

BARREL data products are made freely available to the public and every effort is made to ensure that these products are of the highest quality. However, there may occasionally be issues with either the instruments or data processing that affect the accuracy of data. When possible, a quality flag is included in higher level data products, and known issues are posted in the BARREL data repository. You are also strongly encouraged to follow the guidelines below if you are planning a publication or presentation in which BARREL data are used. This will help you ensure that your science results are valid.

* Users should always use the highest version numbers of data and analysis tools. Browse/quick-look plots are not intended for science analysis or publication and should not be used for those purposes without consent of the principal investigator, PI.
* Users should notify the BARREL PI of the data use and investigation objectives. This will ensure that you are using the data appropriately and have the most recent version of the data or analysis routines. Additionally, if a BARREL team member is already working on a similar or related topic, they may be able to contribute intellectually.
* If BARREL team members are not part of the author list, then users should Credit/Acknowledge the BARREL team as follows: We acknowledge the BARREL team (PI: Robyn Millan) for use of BARREL data.
* Users are also requested to provide the PI with a copy of each manuscript that uses BARREL data upon submission of that manuscript for consideration of publication. On publication, the citation should be transmitted to the PI.

The BARREL PI can be contacted at: [e-mail].

An online copy of the BARREL Data Usage Policy document can be found at: https://barrel.rmillan.host.dartmouth.edu/documents/data.use.policy.pdf.

每40秒传回管家系统电压、温度、电流及有效载荷状态值。注：本记录中的模拟传感器数据基于标准BARREL管家系统布局。部分有效载荷可能存在未在此体现的细微差异。若您所需的特定传感器数据存疑，请联系BARREL团队寻求澄清。

BARREL任务是一项多气球探测计划，旨在研究地球辐射带的电子损失现象。该任务被选为美国国家航空航天局（NASA，National Aeronautics and Space Administration）「与恒星共存（Living with a Star）」计划的机遇任务，旨在通过测量辐射带电子沉降的时空变化，补充辐射带风暴探测器（RBSP，Radiation Belt Storm Probes）任务的观测数据。RBSP任务现已更名为范艾伦探测器（Van Allen Probes）任务。每台BARREL气球载荷均搭载X射线光谱仪，用于测量相对论电子沉降至大气层并与中性粒子碰撞时产生的韧致辐射X射线，同时搭载直流磁强计以测量磁场的超低频（ULF，Ultra Low Frequency）时标变化。BARREL探测任务在距平流层约30公里的高度开展，观测站点靠近南极圈与北极圈附近区域。BARREL探测仪器首次实现了相对论电子沉降的气球原位测量，同时搭配了等离子体波与高能粒子的综合原位观测数据。此外，BARREL数据还被用于表征相对论能量下电子沉降的空间尺度。

首批两次气球观测季于2013年与2014年的南半球夏季（1月至2月）开展，发射站点位于南极洲两处基地：布伦特冰架（Brunt Ice Shelf）哈雷湾（Halley Bay）的英国科考站，以及毛德皇后地（Queen Maud Land）维斯利斯卡韦特（Vesleskarvet）的南非SANAE IV基地（SANAE为South African National Antarctic Expedition的缩写，即南非国家南极考察队）。在2013与2014年的气球观测季中，发射计划旨在维持一个由约5台载荷组成的阵列，该阵列在磁地方时（MLT，Magnetic Local Time）跨度约6小时的区域内分布，该区域通过磁层映射至辐射带区域。因此，BARREL气球星座构成了一个动态演化且缓慢移动的观测阵列，可用于研究辐射带的相对论电子沉降现象。

后续观测季于2015年与2016年在瑞典基律纳（Kiruna）的埃斯兰厄航天中心（Esrange Space Center）开展。2015与2016年的观测季与范艾伦探测器任务、欧洲非相干散射科学协会（EISCAT，European Incoherent Scatter Scientific Association）非相干散射雷达系统及其他地基、天基观测设备协同开展。2015年8月的BARREL观测季共完成7次气球发射，2016年8月的观测季则共计完成8次飞行任务。

综合四次BARREL观测季，共计成功发射超过50台质量约20公斤的平流层气球。由A.J.哈尔福德创建并维护的网站（详见下文信息URL）显示：「截至观测季结束，已有超过90名研究人员每日与BARREL团队协同工作，参与7项不同卫星任务、1项其他气球任务，以及不计其数的地基观测设备相关工作。」尽管BARREL任务在2013至2016年仅开展气球发射任务，但基于这些飞行任务采集数据的相关研究仍在持续，请持续关注后续更新！所有数据与分析软件均对科学界免费开放。

本资源描述中列出的上述信息，参考了多项与BARREL相关的资料编撰而成，主要参考来源包括Millan等人2013年发表于《空间科学评论》（Space Science Reviews）的论文、达特茅斯学院BARREL任务官网以及A.J.哈尔福德维护的网站。

当前发布的所有BARREL CDF（通用数据格式，Common Data Format）数据产品均为V10版本文件。

BARREL将尽快公开所有科学数据产品，但所有用户需阅读并遵守下文列出的BARREL数据使用政策。

BARREL数据使用政策
BARREL数据产品对公众免费开放，团队将尽最大努力确保数据产品的最高质量。但仪器或数据处理过程中偶尔可能出现影响数据准确性的问题。在可行情况下，高级别数据产品会包含质量标记，已知问题会发布在BARREL数据仓库中。若您计划使用BARREL数据进行论文发表或报告展示，我们强烈建议您遵循以下指南，以确保科研结果的有效性。

1. 用户应始终使用最高版本的数据与分析工具。浏览/快速预览图并非为科研分析或发表而设计，未经首席研究员（PI，Principal Investigator）同意，不得将其用于此类用途。
2. 用户应向BARREL首席研究员告知数据使用情况与研究目标，以确保您正确使用数据，并获取最新版本的数据或分析程序。此外，若BARREL团队成员已在开展类似或相关主题的研究，他们可为您提供学术贡献。
3. 若BARREL团队成员未列入作者名单，用户应按以下方式致谢BARREL团队：「本研究使用了BARREL团队（首席研究员：Robyn Millan）提供的数据，特此致谢。」
4. 用户需在提交使用BARREL数据的论文进行评审时，向首席研究员提供论文副本。论文发表后，需将引用信息发送给首席研究员。

可通过以下邮箱联系BARREL首席研究员：[e-mail]。BARREL数据使用政策文档的在线副本可通过以下链接获取：https://barrel.rmillan.host.dartmouth.edu/documents/data.use.policy.pdf。