From 262a08983c0b75515b2cd0582f7b69a9ab33c7ab Mon Sep 17 00:00:00 2001
From: Nico Rey <rey.nico@gmail.com>
Date: Wed, 10 Apr 2019 17:05:26 -0300
Subject: [PATCH] Add support for ISS SSTV channel

---
 receive_iss.sh  |  3 +++
 schedule.sh     |  3 +++
 schedule_iss.sh | 37 +++++++++++++++++++++++++++++++++++++
 3 files changed, 43 insertions(+)
 create mode 100644 receive_iss.sh
 create mode 100644 schedule_iss.sh

diff --git a/receive_iss.sh b/receive_iss.sh
new file mode 100644
index 0000000..98d138f
--- /dev/null
+++ b/receive_iss.sh
@@ -0,0 +1,3 @@
+#!/bin/sh
+datetime=$(date +"%Y%m%d-%H%M%S")
+timeout 660 /usr/local/bin/rtl_fm -M fm -f 145.8M -s 48k -g 50 -p 55 -E wav -E deemp -F 9 - | /usr/bin/sox -t raw -e signed -c 1 -b 16 -r 48000 - /usr/share/html/audio/iss-$datetime.wav rate 11025
diff --git a/schedule.sh b/schedule.sh
index db2ce09..999a52d 100644
--- a/schedule.sh
+++ b/schedule.sh
@@ -6,9 +6,11 @@
 . ~/.noaa.conf
 
 wget -qr https://www.celestrak.com/NORAD/elements/weather.txt -O "${NOAA_HOME}"/predict/weather.txt
+wget -qr http://www.celestrak.com/NORAD/elements/amateur.txt -O "${NOAA_HOME}"/predict/amateur.txt
 grep "NOAA 15" "${NOAA_HOME}"/predict/weather.txt -A 2 > "${NOAA_HOME}"/predict/weather.tle
 grep "NOAA 18" "${NOAA_HOME}"/predict/weather.txt -A 2 >> "${NOAA_HOME}"/predict/weather.tle
 grep "NOAA 19" "${NOAA_HOME}"/predict/weather.txt -A 2 >> "${NOAA_HOME}"/predict/weather.tle
+grep "ZARYA" "${NOAA_HOME}"/predict/amateur.txt -A 2 > "${NOAA_HOME}"/predict/amateur.tle
 
 #Remove all AT jobs
 for i in $(atq | awk '{print $1}');do atrm "$i";done
@@ -17,3 +19,4 @@ for i in $(atq | awk '{print $1}');do atrm "$i";done
 "${NOAA_HOME}"/schedule_sat.sh "NOAA 19" 137.1000
 "${NOAA_HOME}"/schedule_sat.sh "NOAA 18" 137.9125
 "${NOAA_HOME}"/schedule_sat.sh "NOAA 15" 137.6200
+"${NOAA_HOME}"/schedule_iss.sh "ISS (ZARYA)" 145.8000
diff --git a/schedule_iss.sh b/schedule_iss.sh
new file mode 100644
index 0000000..42d5e59
--- /dev/null
+++ b/schedule_iss.sh
@@ -0,0 +1,37 @@
+#!/bin/sh
+
+## debug
+# set -x
+
+. ~/.noaa.conf
+SAT_MIN_ELEV=10
+
+PREDICTION_START=$(/usr/bin/predict -t "${NOAA_HOME}"/predict/amateur.tle -p "${1}" | head -1)
+PREDICTION_END=$(/usr/bin/predict -t "${NOAA_HOME}"/predict/amateur.tle -p "${1}" | tail -1)
+
+
+var2=$(echo "${PREDICTION_END}" | cut -d " " -f 1)
+var21=`echo $PREDICTION_END | cut -d " " -f 1`
+
+MAXELEV=$(/usr/bin/predict -t "${NOAA_HOME}"/predict/amateur.tle -p "${1}" | awk -v max=0 '{if($5>max){max=$5}}END{print max}')
+
+while [ "$(date --date="@${var2}" +%D)" = "$(date +%D)" ]; do
+        START_TIME=$(echo "$PREDICTION_START" | cut -d " " -f 3-4)
+        var1=$(echo "$PREDICTION_START" | cut -d " " -f 1)
+        var3=$(echo "$START_TIME" | cut -d " " -f 2 | cut -d ":" -f 3)
+        TIMER=$(expr "${var2}" - "${var1}" + "${var3}")
+        OUTDATE=$(date --date="TZ=\"UTC\" ${START_TIME}" +%Y%m%d-%H%M%S)
+
+        if [ "${MAXELEV}" -gt "${SAT_MIN_ELEV}" ]
+        then
+                SATNAME=$(echo "$1" | sed "s/ //g")
+                echo ${SATNAME} "${OUTDATE}" "$MAXELEV"
+                echo "${NOAA_HOME}/receive_iss.sh \"${1}\" $2 ISS-${OUTDATE} "${NOAA_HOME}"/predict/amateur.tle \
+${var1} ${TIMER} ${MAXELEV}" | at "$(date --date="TZ=\"UTC\" ${START_TIME}" +"%H:%M %D")"
+        fi
+        NEXTPREDICT=$(expr "${var2}" + 60)
+        PREDICTION_START=$(/usr/bin/predict -t "${NOAA_HOME}"/predict/amateur.tle -p "${1}" "${NEXTPREDICT}" | head -1)
+        PREDICTION_END=$(/usr/bin/predict -t "${NOAA_HOME}"/predict/amateur.tle -p "${1}"  "${NEXTPREDICT}" | tail -1)
+        MAXELEV=$(/usr/bin/predict -t "${NOAA_HOME}"/predict/amateur.tle -p "${1}" "${NEXTPREDICT}" | awk -v max=0 '{if($5>max){max=$5}}END{print max}')
+        var2=$(echo "${PREDICTION_END}" | cut -d " " -f 1)
+done