### Check Python Installation

Source: https://docs.pysolar.org

Verify if Python 3 is installed on a Unix system.

```bash
Python 3.4.2 (default, Oct  8 2014, 14:38:51)
[GCC 4.9.1] on linux
Type "help", "copyright", "credits" or "license" for more information.
>>>
```

```bash
bash: python3: command not found
```

--------------------------------

### Install validation dependencies

Source: https://docs.pysolar.org

Installs the necessary system packages to run the validation IPython notebook.

```bash
sudo apt-get install ipython3-notebook python3 python3-matplotlib python3-pandas python3-scipy python3-tz
```

--------------------------------

### Estimate Clear-Sky Radiation

Source: https://docs.pysolar.org

Predict direct solar irradiation in watts per square meter based on date and solar altitude.

```python
latitude_deg = 42.206 # positive in the northern hemisphere
longitude_deg = -71.382 # negative reckoning west from prime meridian in Greenwich, England
date = datetime.datetime(2007, 2, 18, 15, 13, 1, 130320, tzinfo=datetime.timezone.utc)
altitude_deg = get_altitude(latitude_deg, longitude_deg, date)
radiation.get_radiation_direct(date, altitude_deg)
```

--------------------------------

### Run validation script

Source: https://docs.pysolar.org

Executes the validation script to compare Pysolar outputs against USNO data.

```bash
python3 -i query_usno.py usno_data_6259.txt
```

--------------------------------

### Calculate Solar Azimuth

Source: https://docs.pysolar.org

Calculate the sun's azimuth angle, where zero corresponds to north.

```python
latitude = 42.206
longitude = -71.382

date = datetime.datetime(2007, 2, 18, 15, 13, 1, 130320, tzinfo=datetime.timezone.utc)
print(get_azimuth(latitude, longitude, date))
```

--------------------------------

### Calculate Solar Altitude

Source: https://docs.pysolar.org

Calculate the angle between the sun and a plane tangent to the earth at a specific location and time.

```python
from pysolar.solar import *
import datetime

latitude = 42.206
longitude = -71.382

date = datetime.datetime(2007, 2, 18, 15, 13, 1, 130320, tzinfo=datetime.timezone.utc)
print(get_altitude(latitude, longitude, date))
```

```python
latitude = YOUR_LATITUDE_GOES_HERE
longitude = YOUR_LONGITUDE_GOES_HERE

date = datetime.datetime.now(datetime.timezone.utc)
print(get_altitude(latitude, longitude, date))
```

=== COMPLETE CONTENT === This response contains all available snippets from this library. No additional content exists. Do not make further requests.