def METHOD_NAME(self, domain, organization, desired_nodes):
    icesat2.init(domain, organization=organization, desired_nodes=desired_nodes, bypass_dns=True)
    # Output from:     projinfo -s EPSG:4326 -t EPSG:3413 -o proj
    pipeline = "+proj=pipeline +step +proj=axisswap +order=2,1 +step +proj=unitconvert +xy_in=deg +xy_out=rad +step +proj=stere +lat_0=90 +lat_ts=70 +lon_0=-45 +x_0=0 +y_0=0 +ellps=WGS84"
    rqst = {"samples": {"asset": "arcticdem-mosaic", "proj_pipeline" : pipeline}, "coordinates": [[vrtLon,vrtLat]]}
    rsps = sliderule.source("samples", rqst)
    assert abs(rsps["samples"][0][0]["value"] - vrtElevation) < sigma
    assert rsps["samples"][0][0]["file"] ==  vrtFile
    assert rsps["samples"][0][0]["time"] ==  vrtFileTime