> from import HelioviewerClient > import matplotlib.pyplot as plt > from matplotlib.image import imread > hv = HelioviewerClient () > file = hv. So we can use the approach as shown in the following example: So observatory="SDO",``instrument=AIA``, detector=None, measurement=304 and the source_id is 13.
#Jhelioviewer online download
Suppose we want to download a JPEG 2000 image of the latest AIA 304 image available on .įrom the list above, we know that SDO/AIA 304 is (('SDO', 'AIA', None, '304'), 13). Please note that the JPEG 2000 image data is not the same as the original science data. The JPEG 2000 image is then scaled between 0 and 255 (byte-scaled). This typically involves following the standard image processing procedure used by each instrument team to convert their science data into an image for a webpage. Įvery JPEG 2000 file provided by the Helioviewer Project has been processed to generate an image that HelioviewerClient () > for sourceid, obs in hv. > from import helioviewer > hv = helioviewer. Let us begin by retrieving the available list of sources that Helioviewer supports by using data_sources: To find out what the allowed values are, you can access the data_sources dictionary that is an attribute of the Helioviewer client. Nearly all requests require the user to specify the data they are interested in.ĭepending on the function, it consists of passing in either: observatory, instrument,ĭetector and measurement or source_id keywords.
#Jhelioviewer online full
Note that the HelioviewerClient does not currently offer full access to the HelioViewer API.ĭownload a JPEG 2000 image for the specified datasource that is the closest match in time to the date requested.Īs above but return the full JSON response instead of an image. The client instance can then be used to make various queries against the API using the same parameters one would use when making a web request. To interact with the Helioviewer API, users first create a HelioviewerClient instance. Otherwise, please follow the instructions at the OpenJPEG homepage and the Glymur homepage.
The other package you will need is Glymur.īoth of these are available as conda packages and ideally should be installed in this manner.
The first is OpenJPEG which is an open source library for reading and writing JPEG2000 files.
#Jhelioviewer online software
Sunpy can be used to make several basic requests using the The API including generating a PNG screenshot and downloading a JPEG 2000 image.Īs you can get JPEG 2000 images, you will need two other pieces of software in order to open them in Python.
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