First commit

README.md

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+# NOAA Automated capture using Raspberry PI
+Most of the code and setup stolen from:  [Instructables](https://www.instructables.com/id/Raspberry-Pi-NOAA-Weather-Satellite-Receiver/)
+### New Features!
+  - Nginx webserver to show images
+  - Timestamp and satellite name over every image
+  - WXToIMG configured to create several images (HVC,HVCT,MCIR, etc)
+
+### Manual work
+  - sudo apt-get install imagemagick nginx predict libusb-1.0 cmake
+  - Install [rtlsdr](https://github.com/keenerd/rtl-sdr.git) 
+
+### Important notes
+- I tried to run this on a Raspberry PI Zero Wifi, no luck. Seems like it's too much load for the CPU. Running on a Raspberry PI 2+ is ok.
+- Code was a bit updated on how it handles the UTC vs timezone times.

index.html

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+<h1>WX reception server</h1>
+<a href="image">Images</a>
+<a href="audio">audio</a>

nginx.cfg

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+server {
+	listen 80 default_server;
+	root /home/pi;
+	index index.html index.htm index.nginx-debian.html;
+	autoindex on;
+
+	server_name wx.home wx.reyni.co;
+
+	location / {
+		try_files $uri $uri/ =404;
+	}
+}

receive.sh

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+#!/bin/bash
+if pgrep "rtl_fm" > /dev/null
+then
+	exit 1
+fi
+# $1 = Satellite Name
+# $2 = Frequency
+# $3 = FileName base
+# $4 = TLE File
+# $5 = EPOC start time
+# $6 = Time to capture
+start=`date '+%d-%m-%Y %H:%M'`
+timeout $6 rtl_fm -f ${2}M -s 60k -g 50 -p 55 -E wav -E deemp -F 9 - | sox -t raw -e signed -c 1 -b 16 -r 60000 - /home/pi/audio/$3.wav rate 11025
+
+PassStart=`expr $5 + 90`
+/usr/local/bin/wxmap -T "${1}" -H $4 -p 0 -l 0 -o $PassStart /home/pi/map/${3}-map.png
+for i in ZA MCIR MCIR-precip MSA MSA-precip HVC-precip HVCT-precip HVC HVCT; do
+	/usr/local/bin/wxtoimg -o -m /home/pi/map/${3}-map.png -e $i /home/pi/audio/$3.wav /home/pi/image/$3-$i.png
+	/usr/bin/convert /home/pi/image/$3-$i.png -undercolor black -fill yellow -pointsize 18 -annotate +20+20 "$1 $start" /home/pi/image/$3-$i.png
+done

schedule.sh

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+#!/bin/bash
+#wget -qr https://www.celestrak.com/NORAD/elements/weather.txt -O /home/pi/predict/weather.txt
+grep "NOAA 15" /home/pi/predict/weather.txt -A 2 > /home/pi/predict/weather.tle
+grep "NOAA 18" /home/pi/predict/weather.txt -A 2 >> /home/pi/predict/weather.tle
+grep "NOAA 19" /home/pi/predict/weather.txt -A 2 >> /home/pi/predict/weather.tle
+
+#Remove all AT jobs
+for i in `atq | awk '{print $1}'`;do atrm $i;done
+
+
+#Schedule Satellite Passes:
+/home/pi/schedule_sat.sh "NOAA 19" 137.1000
+/home/pi/schedule_sat.sh "NOAA 18" 137.9125
+/home/pi/schedule_sat.sh "NOAA 15" 137.6200

schedule_sat.sh

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+#!/bin/bash
+PREDICTION_START=`/usr/bin/predict -t /home/pi/predict/weather.tle -p "${1}" | head -1`
+PREDICTION_END=`/usr/bin/predict -t /home/pi/predict/weather.tle -p "${1}" | tail -1`
+
+var2=`echo $PREDICTION_END | cut -d " " -f 1`
+
+MAXELEV=`/usr/bin/predict -t /home/pi/predict/weather.tle -p "${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 19 ]
+  		then
+			echo ${1//" "}${OUTDATE} $MAXELEV
+			echo "/home/pi/receive.sh \"${1}\" $2 ${1//" "}${OUTDATE} /home/pi/predict/weather.tle $var1 $TIMER" | at `date --date="TZ=\"UTC\" $START_TIME" +"%H:%M %D"`
+	fi
+	nextpredict=`expr $var2 + 60`
+	PREDICTION_START=`/usr/bin/predict -t /home/pi/predict/weather.tle -p "${1}" $nextpredict | head -1`
+	PREDICTION_END=`/usr/bin/predict -t /home/pi/predict/weather.tle -p "${1}"  $nextpredict | tail -1`
+	MAXELEV=`/usr/bin/predict -t /home/pi/predict/weather.tle -p "${1}" $nextpredict | awk -v max=0 '{if($5>max){max=$5}}END{print max}'`
+	var2=`echo $PREDICTION_END | cut -d " " -f 1`
+done