@ARTICLE{Dooley2016, title = {{GEO}600 and the {GEO}-{HF} upgrade program: successes and challenges}, status = {}, author = {Dooley, K. L., Leong, J. R., Adams, T., Affeldt, C., Bisht, A., Bogan, C., Degallaix, J., Graf, C., Hild, S., Hough, J., Khalaidovski, A., Lastzka, N., Lough, J., Luck, H., Macleod, D., Nuttall, L., Prijatelj, M., Schnabel, R., Schreiber, E., Slutsky, J., Sorazu, B., Strain, K. A., Vahlbruch, H., Was, M., Willke, B., Wittel, H., Danzmann, K. and Grote, H.}, journal = {Classical and Quantum Gravity}, volume = {33}, pages = {075009}, year = {2016}, }