Mobilefish.com
Author: Robert Lie

Determine collinear antenna 1 gain for elevation=90° and azimuth=0°, 
see LoRa/LoRaWAN tutorial 46.
See: https://www.mobilefish.com/developer/lorawan/lorawan_quickguide_tutorial.html

The ½λ dipole antenna used is the ½λ dipole antenna with less parts as explained in 
tutorial 41.

==========================================================================================
½λ dipole antenna measurements
==========================================================================================
{
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  "modulation": "LORA",
  "data_rate": "SF7BW125",
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{
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  "gateways": [
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      "timestamp": 2484132083,
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{
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  "coding_rate": "4/5",
  "gateways": [
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{
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  "coding_rate": "4/5",
  "gateways": [
    {
      "gtw_id": "eui-b827ebfffec74b36",
      "timestamp": 2618498004,
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{
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  "frequency": 868.3,
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  "data_rate": "SF7BW125",
  "coding_rate": "4/5",
  "gateways": [
    {
      "gtw_id": "eui-b827ebfffec74b36",
      "timestamp": 2686026995,
      "time": "",
      "channel": 1,
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      "snr": 9.5,
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      "longitude": 4.8112044,
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}

{
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  "gateways": [
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      "gtw_id": "eui-b827ebfffec74b36",
      "timestamp": 2752415340,
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      "snr": 9.2,
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{
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  "gateways": [
    {
      "gtw_id": "eui-b827ebfffec74b36",
      "timestamp": 2818388091,
      "time": "",
      "channel": 2,
      "rssi": -25,
      "snr": 6.8,
      "rf_chain": 1,
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      "longitude": 4.8112044,
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    }
  ]
}

{
  "time": "2019-09-09T11:14:33.884461929Z",
  "frequency": 867.9,
  "modulation": "LORA",
  "data_rate": "SF7BW125",
  "coding_rate": "4/5",
  "gateways": [
    {
      "gtw_id": "eui-b827ebfffec74b36",
      "timestamp": 2885416652,
      "time": "",
      "channel": 7,
      "rssi": -27,
      "snr": 9,
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      "longitude": 4.8112044,
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  ]
}

{
  "time": "2019-09-09T11:15:39.872583835Z",
  "frequency": 868.1,
  "modulation": "LORA",
  "data_rate": "SF7BW125",
  "coding_rate": "4/5",
  "gateways": [
    {
      "gtw_id": "eui-b827ebfffec74b36",
      "timestamp": 2951411547,
      "time": "",
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}

{
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  "frequency": 867.1,
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  "data_rate": "SF7BW125",
  "coding_rate": "4/5",
  "gateways": [
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      "gtw_id": "eui-b827ebfffec74b36",
      "timestamp": 3017663699,
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}

{
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  "frequency": 868.3,
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  "gateways": [
    {
      "gtw_id": "eui-b827ebfffec74b36",
      "timestamp": 3083981579,
      "time": "",
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{
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    {
      "gtw_id": "eui-b827ebfffec74b36",
      "timestamp": 3150819483,
      "time": "",
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}

{
  "time": "2019-09-09T11:20:06.279621873Z",
  "frequency": 868.5,
  "modulation": "LORA",
  "data_rate": "SF7BW125",
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  "gateways": [
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      "gtw_id": "eui-b827ebfffec74b36",
      "timestamp": 3217818179,
      "time": "",
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}

{
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  "data_rate": "SF7BW125",
  "coding_rate": "4/5",
  "gateways": [
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      "timestamp": 3285301156,
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}

{
  "time": "2019-09-09T11:22:19.60428529Z",
  "frequency": 868.1,
  "modulation": "LORA",
  "data_rate": "SF7BW125",
  "coding_rate": "4/5",
  "gateways": [
    {
      "gtw_id": "eui-b827ebfffec74b36",
      "timestamp": 3351139787,
      "time": "",
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    }
  ]
}


==========================================================================================
Collinear antenna 1 measurements (elevation=90° and azimuth=0°)
==========================================================================================
 
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  "frequency": 868.1,
  "modulation": "LORA",
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  "gateways": [
    {
      "gtw_id": "eui-b827ebfffec74b36",
      "timestamp": 1208843683,
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{
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      "timestamp": 1276022931,
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}

{
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  "frequency": 868.3,
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  "coding_rate": "4/5",
  "gateways": [
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      "timestamp": 1342426139,
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      "longitude": 4.8112044,
      "altitude": 9,
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    }
  ]
}

{
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  "coding_rate": "4/5",
  "gateways": [
    {
      "gtw_id": "eui-b827ebfffec74b36",
      "timestamp": 1408755756,
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}

{
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  "gateways": [
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{
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{
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{
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{
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{
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{
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{
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{
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{
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{
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