Pre-Measured Flux Gains

This section provides pre-measured flux gains derived from Liu et al. (2024). The data were collected under the following reference conditions:

• Ambient Temperature: 15 degrees Celsius

• Zenith Angle: 10.15 degrees

Corrections for temperature and zenith angle are necessary if your observation conditions differ.

Data

The data are available in HDF5 format at This link and include the following:

• Ambient_Temperature: Ambient temperature (°C)

• ZA: Zenith angle (°)

• freq: Frequency sample (MHz)

• K_Jy1…K_Jy19: Flux gain (K/Jy)

• err_K_Jy1…err_K_Jy19: Flux gain error

Usage

Method 1: Simplified Approach

Use the hifast.flux function (version >= 1.3a3), which automatically handles ambient temperature and zenith angle corrections.

Method 2: Manual Correction

1. Read the flux gain data from the HDF5 file.

2. Apply the appropriate corrections for your specific observation conditions.

The following example shows the basic procedure.

• Example of reading flux gain of Liu et al. 2024