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\(\underline{\text{NRSur7dq4 surrogate model}}\)

\(\underline{\text{GW Strain}}\):

For the strain data, the complex strain \( h = h_{+} - i h_\times \) evaluated at \( ( \mathbf{\iota}, \pi/2 - \mathbf{\phi_{ref}}) \), on the sky of the reference frame is returned.

\(\underline{h_{lm} \text{ mode}}\):

For the \(h_{lm} \) mode data, the strain is expressed as sum of spin-weighted spherical harmonic modes, \( h(t, \iota, \phi_0) \, = \sum_{l=2}^{\infty} \sum_{m=-l}^{l} \, h_{lm}(t) \, \sideset{_{-2}}{_{lm}} Y(\iota, \phi_0) \)

\(\underline{\text{Parameters:}}\):

q	: Mass ratio, \( \frac{m_A}{m_B} \ge 1 \) , here \( m_A\) is the mass of the heavier BH and \( m_B\) is the mass of the lighter BH
\( \chi_{A} \)	: Initial dimensionless spin vector of the heavier black hole.
\( \chi_{B} \)	: Initial dimensionless spin vector of the lighter black hole.
\( \mathbf{\iota} \)	: Initial inclination angle between the orbital angular momentum direction and the line-of-sight to the observer.
\( \mathbf{\phi_{ref}} \)	: Initial azimuthal angle on the sky of the source frame following the LAL convention.
\( (\ell,m) \)	: Indicate the spin-weighted spherical harmonic mode coefficients in the expansion of \( h(t, \iota, \phi_0) \, \)

\(\underline{\text{Other fixed parameters:}}\):

f_low = 0 : This input in the NR7dq4 surrogate model implies that the entire waveform is returned.
times = np.arange(-4299,99,1) : This input in the NR7dq4 surrogate model fixes the time samples chosen for the waveforms.

video_length = 20 sec : Downloaded videos are 20 seconds long.
video_fps = 24 : Downloaded videos have 24 fps.
video_width = 1500 px : Downloaded videos have width of 1500px.
video_height = 700 px : Downloaded videos have height of 700px.

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