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thetechprepper
335 lines
10 KiB
Bash
Executable File
335 lines
10 KiB
Bash
Executable File
#!/bin/bash
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#
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# Author : Gaston Gonzalez
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# Date : 23 May 2023
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# Updated : 27 August 2025
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# Purpose : Offline HF prediction using voacapl
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set -e
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set -o pipefail
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trap 'last_command=$current_command; current_command=$BASH_COMMAND' DEBUG
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trap 'echo -e "${RED}\"${last_command}\" command failed with exit code $?.${NC}"' ERR
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source /opt/emcomm-tools/bin/et-common
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lookup_station() {
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local type="$1" # call | grid | latlon
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local value="$2" # callsign | grid | "lat,lon"
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local json_file="$3"
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case "$type" in
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gps)
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curl -f -s "http://localhost:1981/api/geo/position" | jq .position > "$json_file"
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if [[ $? -ne 0 ]]; then
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echo -e "${RED}Can't determine your position for use as the transmitting station.${NC}" >&2
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echo "Try specifying your callsign, grid or lat,lon." >&2
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echo " --tx-call CALLSIGN Transmitting station callsign" >&2
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echo " --tx-grid GRID Transmitting station Maidenhead grid" >&2
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echo " --tx-latlon LAT,LON Transmitting station coordinates in decimal degrees" >&2
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return 1
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fi
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;;
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call)
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curl -f -s "http://localhost:1981/api/license?callsign=${value}" > "$json_file"
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if [[ $? -ne 0 ]]; then
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echo -e "${RED}Location not found for callsign: ${value}.${NC}" >&2
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return 1
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fi
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;;
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grid)
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curl -f -s "http://localhost:1981/api/geo/grid?gridSquare=${value}" | jq '{lat: .position.lat, lon: .position.lon}' > "$json_file"
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if [[ $? -ne 0 ]]; then
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echo -e "${RED}Error converting grid to lat/lon using value: ${value}.${NC}" >&2
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return 1
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fi
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;;
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latlon)
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# Write directly to JSON for consistency
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local lat lon
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IFS=',' read -r lat lon <<< "$value"
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if [[ -z $lat || -z $lon ]]; then
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echo -e "${RED}Invalid lat,lon format: $value. Expected 'lat,lon'.${NC}" >&2
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return 1
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fi
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jq -n --arg lat "$lat" --arg lon "$lon" '{lat: ($lat|tonumber), lon: ($lon|tonumber)}' > "$json_file"
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;;
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*)
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echo -e "${RED}Invalid station type: $type${NC}" >&2
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return 1
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;;
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esac
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# Extract lat/lon regardless of type
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local lat lon
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lat=$(jq .lat "$json_file")
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lon=$(jq .lon "$json_file")
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echo "$lat $lon"
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}
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validate_latitude() {
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local lat="$1"
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if [[ -z "$lat" ]]; then
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echo -e "${RED}Latitude can't be an empty value${NC}" >&2
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return 1
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fi
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if ! [[ "$lat" =~ ^-?[0-9]+([.][0-9]+)?$ ]]; then
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echo -e "${RED}Latitude must be a number${NC}" >&2
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return 1
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fi
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local latf
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latf=$(printf "%.10f" "$lat" 2>/dev/null) || {
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echo -e "${RED}Error converting latitude${NC}" >&2
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return 1
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}
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# Check range: -90 <= lat <= 90
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if (( $(echo "$latf < -90" | bc -l) )) || (( $(echo "$latf > 90" | bc -l) )); then
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echo -e "${RED}Latitude must be in range between -90 and 90 degrees${NC}" >&2
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return 1
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fi
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}
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validate_longitude() {
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local lon="$1"
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if [[ -z "$lon" ]]; then
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echo -e "${RED}Longitude can't be an empty value${NC}" >&2
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return 1
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fi
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if ! [[ "$lon" =~ ^-?[0-9]+([.][0-9]+)?$ ]]; then
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echo -e "${RED}Longitude must be a number${NC}" >&2
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return 1
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fi
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local lonf
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lonf=$(printf "%.10f" "$lon" 2>/dev/null) || {
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echo -e "${RED}Error converting longitude ${NC}" >&2
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return 1
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}
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# Check range: -180 <= lat <= 1800
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if (( $(echo "$lon < -180" | bc -l) )) || (( $(echo "$lon > 180" | bc -l) )); then
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echo -e "${RED}Longitude must be in range between -180 and 180 degrees${NC}" >&2
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return 1
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fi
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}
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ET_SSN="${HOME}/.local/share/emcomm-tools/voacap/ssn.txt"
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if [[ ! -e ${ET_SSN} ]]; then
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echo -e "${RED}Sunspot number file not available:${WHITE}${ET_SSN}${NC}"
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echo -e "${YELLOW}Try running the following to fetch the sunspot numbers (requires Internet):${NC}"
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echo -e "${WHITE}cd ${HOME}/.local/share/emcomm-tools/voacap${NC}"
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echo -e "${WHITE}./fetch-ssn.sh${NC}"
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exit 1
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fi
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usage() {
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echo "Usage: $(basename $0) [OPTIONS]"
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echo
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echo "Station options (choose one per TX and RX):"
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echo " --tx-call CALLSIGN Transmitting station callsign"
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echo " --tx-grid GRID Transmitting station Maidenhead grid"
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echo " --tx-latlon LAT,LON Transmitting station coordinates in decimal degrees"
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echo " --rx-call CALLSIGN Receiving station callsign"
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echo " --rx-grid GRID Receiving station Maidenhead grid"
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echo " --rx-latlon LAT,LON Receiving station coordinates in decimal degrees"
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echo
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echo "If no --tx option is specified, your position will be pulled from a supported"
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echo "ETC GPS unit or fallback to the grid square configured by 'et-user'."
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echo
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echo "Other options (required):"
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echo " -p POWER Output power [5|20|100|500|1500]"
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echo " -m MODE Mode [AM|CW|JS8|SSB]"
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echo
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exit 1
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}
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tx_type=""
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tx_value=""
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rx_type=""
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rx_value=""
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power=""
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mode=""
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while [[ $# -gt 0 ]]; do
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case "$1" in
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--tx-call) tx_type="call"; tx_value="$2"; shift 2 ;;
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--tx-grid) tx_type="grid"; tx_value="$2"; shift 2 ;;
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--tx-latlon) tx_type="latlon"; tx_value="$2"; shift 2 ;;
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--rx-call) rx_type="call"; rx_value="$2"; shift 2 ;;
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--rx-grid) rx_type="grid"; rx_value="$2"; shift 2 ;;
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--rx-latlon) rx_type="latlon"; rx_value="$2"; shift 2 ;;
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-p) power="$2"; shift 2 ;;
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-m) mode="$2"; shift 2 ;;
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-*|--*) echo "Unknown option: $1"; usage ;;
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*) echo "Unexpected argument: $1"; usage ;;
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esac
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done
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# Use local ETC user position if TX station not defined
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if [[ -z $tx_type ]]; then
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tx_type="gps"
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fi
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# Validate required args
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[[ -z $rx_type || -z $power || -z $mode ]] && usage
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#echo "TX ($tx_type): $tx_value"
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#echo "RX ($rx_type): $rx_value"
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#echo "Power: $power"
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#echo "Mode: $mode"
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# Allow for case-insensitve match of the user-defined operating mode
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MODE=$mode
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case "${MODE,,}" in
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js8)
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MD="13.0"
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;;
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cw)
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MD="24.0"
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;;
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ssb)
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MD="38.0"
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;;
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am)
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MD="49.0"
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;;
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*)
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echo -e "${RED}Unknown mode: ${MODE}${NC}" >&2
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usage
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exit 1
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;;
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esac
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ET_VOA_WORKING_DIR=$HOME/itshfbc/run
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ET_VOA_REPORT=${ET_VOA_WORKING_DIR}/voacapl.txt
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INP=${ET_VOA_WORKING_DIR}/voacapx.dat
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OUT=${ET_VOA_WORKING_DIR}/voacapx.out
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# Year = 2023
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YEAR=$(echo $(date '+%Y'))
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# Month (May) = 5.00
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MONTH=$(date +'%m')
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MONTH_FMT=$(date +'%-m.00')
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#######################################################################
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# TX Antenna
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#######################################################################
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if ! result=$(lookup_station "$tx_type" "$tx_value" tx-station.json); then
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if [[ "$tx_type" == "call" ]]; then
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echo "Try specifying a grid or lat,lon for the transmitting station."
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echo " --tx-grid GRID Transmitting station Maidenhead grid"
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echo " --tx-latlon LAT,LON Transmitting station coordinates in decimal degrees"
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fi
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exit 1
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fi
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read TL TK <<< "$result"
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validate_latitude "$TL" || exit 1
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validate_longitude "$TK" || exit 1
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TL1=$( awk -v n1=$TL -v n2=90 -v n3=-90 'BEGIN {if (n1<n3 || n1>n2) printf ("%s", "a"); else printf ("%.2f", n1);}' )
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# add North or South (N/S)
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TLA=$( awk -v n1=$TL1 -v n2=0 'BEGIN {if (n1<n2) { n1=substr(n1,2); printf ("%6sS", n1); } else printf ("%6sN", n1);}' )
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TK1=$( awk -v n1=$TK -v n2=180 -v n3=-180 'BEGIN {if (n1<n3 || n1>n2) printf ("%s", "a"); else printf ("%.2f", n1);}' )
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# add East or West (E/W)
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TLO=$( awk -v n1=$TK1 -v n2=0 'BEGIN {if (n1<n2) { n1=substr(n1,2); printf ("%7sW", n1); } else printf ("%7sE", n1);}' )
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#######################################################################
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# RX Antenna
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#######################################################################
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if ! result=$(lookup_station "$rx_type" "$rx_value" rx-station.json); then
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if [[ "$rx_type" == "call" ]]; then
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echo "Try specifying a grid or lat,lon for the receiving station."
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echo " --rx-grid GRID Receiving station Maidenhead grid"
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echo " --rx-latlon LAT,LON Receiving station coordinates in decimal degrees"
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fi
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exit 1
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fi
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read RL RK <<< "$result"
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validate_latitude "$RL" || exit 1
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validate_longitude "$RK" || exit 1
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RL1=$( awk -v n1=$RL -v n2=90 -v n3=-90 'BEGIN {if (n1<n3 || n1>n2) printf ("%s", "a"); else printf ("%.2f", n1);}' )
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# add North or South
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RLA=$( awk -v n1=$RL1 -v n2=0 'BEGIN {if (n1<n2) { n1=substr(n1,2); printf ("%6sS", n1); } else printf ("%6sN", n1);}' )
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RK1=$( awk -v n1=$RK -v n2=180 -v n3=-180 'BEGIN {if (n1<n3 || n1>n2) printf ("%s", "a"); else printf ("%.2f", n1);}' )
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# add East or West
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RLO=$( awk -v n1=$RK1 -v n2=0 'BEGIN {if (n1<n2) { n1=substr(n1,2); printf ("%7sW", n1); } else printf ("%7sE", n1);}' )
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# Power settings
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# Use 80% of user-defined power and express in killiwatts
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# TODO: Make calculation dynamic.
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PWR=$power
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PW="0.0800"
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echo "TX Power: ${PWR} watts"
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if [ "$PWR" = "5" ]; then
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PW="0.0040"
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elif [ "$PWR" = "20" ]; then
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PW="0.0160"
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elif [ "$PWR" = "100" ]; then
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PW="0.0800"
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elif [ "$PWR" = "500" ]; then
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PW="0.4000"
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elif [ "$PWR" = "1500" ]; then
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PW="1.2000"
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else
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echo "Unsupported power level."
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usage
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exit 1
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fi
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# Format for 117
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# NOTE: The card requires <SSN>. (117.)
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ssn=`grep "$YEAR $MONTH" ${ET_SSN} | awk '{print $5}' | cut -d"." -f1`
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# read more about fine-tuning your input file:
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# http://www.voacap.com/voacapw.html
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# http://www.voacap.com/frequency.html
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echo -e "\n"
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cat << END | tee $INP
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LINEMAX 999 number of lines-per-page
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COEFFS CCIR
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TIME 1 24 1 1
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MONTH $YEAR $MONTH_FMT
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SUNSPOT $ssn.
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LABEL $TX$RX
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CIRCUIT $TLA $TLO $RLA $RLO S 0
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SYSTEM 1. 155. 3.00 90. $MD 3.00 0.10
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FPROB 1.00 1.00 1.00 0.00
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ANTENNA 1 1 2 30 0.000[samples/sample.00 ] 0.0 $PW
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ANTENNA 2 2 2 30 0.000[samples/sample.00 ] 0.0 0.0000
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FREQUENCY 3.60 5.30 7.1010.1014.1018.1021.1024.9028.20 0.00 0.00
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METHOD 30 0
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BOTLINES 8 12 21
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TOPLINES 1 2 3 4 6
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EXECUTE
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QUIT
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END
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voacapl -s ~/itshfbc
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echo "voacapl exited with $? using in=$INP and out=$OUT"
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(tail -n +27 $OUT | head -n 5 && grep -e'- REL' $OUT && grep -e'- S DBW' $OUT) | ./rel.pl > ${ET_VOA_REPORT}
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cat ${ET_VOA_REPORT}
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