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Development of the QuarkNet DAQ card followed discussions between QuarkNet, CROP and WALTA participants, during and after the SALTA Workshop held as part of the Education and Outreach program at Snowmass-2001 [5]. The need for low-cost but highly capable front-end electronics suitable for very small air shower arrays became clear. A prototype DAQ card previously developed for QuarkNet served as a starting point, but it did not yet include GPS time synchronization or pulse edge time digitization functionality.

CROP [6], WALTA [7] and SALTA [8] all aim to create large-area extensive air shower (EAS) detector arrays for ultra-high energy cosmic rays, by installing mini-arrays of scintillation counter detectors in secondary schools, in the Lincoln, NE, Seattle, WA, and Aspen, CO areas, respectively. Data taken at individual school sites (Fig. 1) are shared via Internet connections and scanned for multi-site coincidence events.

在QuarkNet数据采集卡的发展与QuarkNet后，作物和WALTA参加，讨论期间和之后，萨尔塔工作坊，教育及外展计划的一部分斯诺马斯举行2001 [5]。对于低成本的需要，但非常能干的前端电子产品的非常小的风淋适当阵列变得清晰。数据采集卡的原型以前QuarkNet开发服务作为出发点，但还没有包括GPS时间同步或脉冲边沿的时间数字化功能。

作物[6]，WALTA [7]和萨尔塔[8]的所有目的是创造大面积广阔的航空淋浴通过安装的超小型（防盗）探测器阵列，高能量宇宙射线的闪烁计数器阵列探测器在中学，在林肯，东北，华盛顿州西雅图，和Aspen，合作的范围，分别为。数据采取个别学校用地（图1）是通过Internet连接共享和扫描多站点巧合事件。