def METHOD_NAME(N, prefix):
    """Generate (constant) rasters of time line
        t0, t1, t2, ..., t_{N-1})
        where t0 = 0, t_{N-1} = 2*pi
    N -- count of result rasters
    prefix -- prefix for the raster names
    return list of names for the result rasters
    """
    assert N > 1
    names = dict()
    for i in range(N):
        output = prefix + _time_to_name(i)
        t = get_time(N, i, deg=True)
        grass.mapcalc(
            "${out} = ${t}", out=output, t=t, quiet=True, overwrite=grass.overwrite()
        )
        names[i] = output
    return names