Timmy
3407170b8c
- Add download_ephemeris.sh script for automated JPL ephemeris file downloads - Support de421, de422, and de440s ephemeris files - Update README.md with download script usage instructions - All text in Traditional Chinese Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
148 lines
3.6 KiB
Bash
Executable File
148 lines
3.6 KiB
Bash
Executable File
#!/usr/bin/env bash
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# 下載 JPL 星曆表檔案用於陰曆計算
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# 使用方式: ./download_ephemeris.sh [de421|de422|de440s|all]
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# 預設: de421
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set -e
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# 輸出顏色
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RED='\033[0;31m'
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GREEN='\033[0;32m'
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YELLOW='\033[1;33m'
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NC='\033[0m' # 無顏色
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# JPL 星曆表檔案下載網址
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BASE_URL="https://naif.jpl.nasa.gov/pub/naif/generic_kernels/spk/planets"
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# 檔案資訊: 名稱 大小mb 說明
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declare -A FILES=(
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["de421"]="de421.bsp 15 JPL DE421 (1900-2050, ~15MB)"
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["de422"]="de422.bsp 500 JPL DE422 (較長時期範圍, ~500MB)"
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["de440s"]="de440s.bsp 30 JPL DE440s (1900-2150, ~30MB)"
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)
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# 輸出資訊
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print_info() {
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echo -e "${GREEN}[資訊]${NC} $1"
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}
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# 輸出警告
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print_warn() {
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echo -e "${YELLOW}[警告]${NC} $1"
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}
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# 輸出錯誤
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print_error() {
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echo -e "${RED}[錯誤]${NC} $1"
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}
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# 下載檔案
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download_file() {
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local name=$1
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local url=$2
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local filename=$(basename "$url")
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print_info "正在下載 $filename..."
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if [ -f "$filename" ]; then
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print_warn "$filename 已存在，跳過下載"
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return 0
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fi
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if curl -L -o "$filename" "$url"; then
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print_info "$filename 下載完成"
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return 0
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else
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print_error "$filename 下載失敗"
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return 1
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fi
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}
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# 驗證檔案大小
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verify_file() {
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local filename=$1
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local expected_size_mb=$2
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if [ ! -f "$filename" ]; then
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print_error "檔案 $filename 不存在"
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return 1
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fi
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local actual_size=$(du -m "$filename" | cut -f1)
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if [ "$actual_size" -lt 1 ]; then
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print_error "$filename 檔案大小異常"
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rm -f "$filename"
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return 1
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fi
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print_info "$filename 檔案大小: ${actual_size}MB"
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return 0
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}
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# 主下載函式
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download_ephemeris() {
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local target=${1:-de421}
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case "$target" in
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de421)
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print_info "下載 DE421 (推薦，涵蓋 1900-2050)"
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download_file "de421" "$BASE_URL/a_old_versions/de421.bsp"
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verify_file "de421.bsp" 15
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;;
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de422)
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print_info "下載 DE422 (大檔案，涵蓋更長時間)"
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print_warn "DE422 約 500MB，下載可能需要較長時間..."
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download_file "de422" "$BASE_URL/a_old_versions/de422.bsp"
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verify_file "de422.bsp" 500
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;;
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de440s)
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print_info "下載 DE440s (精簡版，涵蓋 1900-2150)"
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download_file "de440s" "$BASE_URL/de440s.bsp"
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verify_file "de440s.bsp" 30
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;;
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all)
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print_info "下載所有星曆表檔案"
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for key in "${!FILES[@]}"; do
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download_ephemeris "$key"
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echo
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done
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;;
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list)
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echo "可用的星曆表檔案:"
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for key in "${!FILES[@]}"; do
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echo " - $key: ${FILES[$key]}"
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done
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;;
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*)
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print_error "未知的選項: $target"
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echo
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echo "用法: $0 [de421|de422|de440s|all|list]"
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echo
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echo "說明:"
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for key in "${!FILES[@]}"; do
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echo " $key - ${FILES[$key]}"
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done
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exit 1
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;;
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esac
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}
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# 無參數時顯示說明
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if [ $# -eq 0 ]; then
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echo "下載 JPL 星曆表檔案"
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echo
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echo "用法: $0 [de421|de422|de440s|all|list]"
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echo
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echo "預設下載: de421"
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echo
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download_ephemeris "list"
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echo
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read -p "按 Enter 下載 de421，或按 Ctrl+C 取消..."
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download_ephemeris "de421"
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else
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download_ephemeris "$1"
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fi
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print_info "完成！"
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