Comparison of Tropospheric Emission Spectrometer nadir water vapor retrievals with in situ measurements by Shephard, M, Herman, R, Fisher, B, Cady-Pereira, K, Clough, SA, Payne, V, Whiteman, D, Comer, J, Vomel, H, Miloshevich, L, Forno, R, Adam, M, Osterman, G, Eldering, A, Worden, JR, Brown, L, Worden, H, Kulawik, S, Rider, D, Goldman, A, Beer, R, Bowman, K, Rodgers, C, Luo, M, Rinsland, C