I want to know the answer to the following question:
Whose work did Al-Battani improve?
All the background I'm provided with is that "The corrections made to the geocentric model by al-Battani, Ibn al-Haytham, Averroes and the Maragha astronomers such as Nasir al-Din al-Tusi, Mo'ayyeduddin Urdi and Ibn al-Shatir are similar to Copernican heliocentric model.". Is that enough to answer the question?
Answer: no