Stratus RASP Tools
Useful DIY RASP Scripts
This page discusses how you can use the RASP spot location graphs.
The RASP forecast covers the entire UK and provides forecasts at differing resolutions for up to one week in advance. However, the raw tabular data is great, but sometimes is difficult to get visualisations of what is happening. Examples include subtle temperature and wind changes as a front passes through.
Why are spot forecasts useful? Well, if you're not going more than 5km from your launch site, the RASP forecast further afield is not that useful. This is probably when local you're soaring locally and a forecast for a turn point well help you if staying in one place.
Before having a look at the graphs on offer, a quick word on how to use the URL script parameters.
The graph scripts use the standard Internet method for sending parameters to scripts. Here, all the parameters use an ampersand (&) to state the parameter is coming next, followed by the parameter name, followed by an equals symbol (=), followed by the value. So in the rest of this page, bear this in mind if you wish to change the input parameters.
Using Turn PointsAll the graphs provided are aware the three letter UK Turnpoint references. So for example, Lasham Club house parameter would look like the following:
Some points on usage and performance:
Ok, lets have a look at the graphs we can use.
Main MetricsThis script provides a graph of parameters from the RASP core data set to give an idea of boundary height and cloud base. For Lasham Club house next Thursday using a turn point would look like:
http://app.stratus.org.uk/blip/graph/blip_main.php?day=Thursday&tp=LASAnd this would produce:
TemperatureThis script provides a graph of wet/dry temperatures.
http://app.stratus.org.uk/blip/graph/blip_temp.php?model=UK12&tp=ABOAnd this would produce:
Wind SpeedThis script provides a graph of wind speeds in Knots. Using Lasham Clubhouse again we get:
http://app.stratus.org.uk/blip/graph/blip_wind.php?model=UK12&tp=LASAnd this would produce:
Or for Aboyne next Saturday we would get
http://app.stratus.org.uk/blip/graph/blip_wind.php?day=Saturday&tp=ABOAnd this would produce:
Wind DirectionThis script provides a graph of wind direction. Using Long Mynd we get:
http://app.stratus.org.uk/blip/graph/blip_wind_dir.php?model=UK12&tp=MYNAnd this would produce:
Cu PotentialThis script provides a graph of Cu Potential. Using Tibenham in Norfolk we get:
http://app.stratus.org.uk/blip/graph/blip_cu.php?model=UK12&tp=TIBAnd this would produce:
SunThis script provides a graph of Sun in percent. Using Hus-Bos for Sunday we get:
http://app.stratus.org.uk/blip/graph/blip_sun.php?day=Sunday&tp=HUSAnd this would produce:
RainAfter the sun comes the rain. This script provides a graph of forecast rain in millimeters per half hour. Using Milfield for Sunday we get:
http://app.stratus.org.uk/blip/graph/blip_rain.php?day=Sunday&tp=MILAnd this would produce:
'Stars'Paul Scorer came up with an experimental rating system called stars. The metric basically states a higher number equals better conditions. This is an experimental metric based on using data from other standard RASP parameters. Using Gransden Lodge for Sunday we get:
http://app.stratus.org.uk/blip/graph/blip_stars.php?day=Sunday&tp=GRLAnd this would produce:
If you are into paragliding or hang gliding, put &hg on the end of the URL for a stars forcast for your flying type. This would look like:
Day Viewer for a Given LocationOther tools you can embed include a day viewer by turnpoint or latitude/longitude with a given day (use the parameters: &lat and &lon):
http://app.stratus.org.uk/blip/graph/dayview.php?lat=53.751&lon=1.20673&day=SundayOr by turnpoint:
http://app.stratus.org.uk/blip/graph/dayview.php?tp=LAS&day=WednesdayThese are without headers/footers so you can embed in another site.
Using Models instead of DaysIf you are interested in a model instead of a day, the options are slightly different. The models available are:
Using Today and Tomorrow (Days)You can also just today or tomorrow. To go this way, use the &day option with &day=Today or &day=Tomorrow. Examples for Lasham would look like: