Planck/LFI: Potential telemetry saving on HFI 4K high resolution thermometers, LFI constraints
Date Issued
2009
Author(s)
Abstract
This document analyses the degradation of the accuracy of HFI Scientific Thermometers Telemetry as a function of the quantization step applied at the output of each thermometer, qT. Scientific thermometers are those thermometers which are managed by HFI as part of the science telemetry and not as part of House Keeping telemetry. The HFI team recently identified the need of an increase of the HFI telemetry rate relative to the baseline allocation. The HFI 4K high resolution thermometers are important for LFI for monitoring the reference load temperature The idea behind this exercise is to recover bandwidth in the HFI scientific telemetry by increasing the quantization step applied at the output of these thermometers to gain in Compression Rate, C_rT, for the packets carring such information. This implies a degradation of the output of such thermometers and so an analysis is needed to asses the maximum level of degradation acceptable for LFI. This document is a contribution to the action taken at the Telemetry meeting held at MOC July 20th , 2009.
Volume
PL_LFI_OAT_TN_064
Rights
open.access
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PL_LFI_OAT_TN_064.pdf
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Planck Report
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