一次设置，持续运行。
Set up once. Keep observing.

1. 输入中心坐标 / Set your location

   系统每6小时检查近期高清影像和新拍方案，每日检查免费参考。目标采集间隔不代表保证交付频率。
   New imagery and tasking options are checked every 6 hours; free references daily. Target cadence is not a delivery guarantee.

2. 仅付款时需要您 / Approve payments

   核验当前报价，查看完整订单，输入金额及网站密码，最后再次确认才会提交真实采购。预算不足不会自动下单或降低质量。
   Review the live quote, enter the amount and password, then confirm the real purchase. No automatic payment or quality downgrade.

3. 自动跟踪与归档 / Track & archive automatically

   现有影像通常下单后24小时；新拍通常采集后48小时。实际拍摄时间未知时明确显示未知。
   Archive delivery is usually within 24h of order; tasking within 48h after capture. Unknown capture times remain unknown.

4. 随时停止 / Stop anytime

   停止后不再进行该地点的新查询或采购，已经提交的付费订单继续接收交付。停止不是向供应商取消订单。
   Stopping ends new searches and purchases; already submitted orders still receive delivery. It does not cancel supplier orders.

磁盘不足时清理最早地图文件，保留订单记录。红色差异为疑似变化，不能替代人工判读。
Oldest imagery files are reclaimed when storage is low; order records remain. Red change marks require interpretation.