Gravity waves play an important role not only in transferring the momentum and energy to the upper atmosphere but also significantly contribute in different global atmospheric phenomenon like Brewer-Dobson circulation along with planetary waves. Larger differences in the gravity wave model parameters with the real observations has recommended more observational studies for better predictions. In this paper, we have launched 80 GPS-radiosondes in different seasons (20 per each season) to parameterize the inertia gravity wave (IGW) characteristics over a tropical station Hyderabad (17.4° N, 78.5 °E). FFT analysis of zonal, meridional winds and temperature fluctuations shows the generation of IGW over this latitude irrespective of the presence of strong tides and Quasi Two Day Wave (QTDW). Monsoon and winter amplitudes are maximized in both tropospheric and stratospheric regions. Hodograph analysis is used to estimate the IGW parameters. No significant seasonal changes are observed in vertical and horizontal wavelengths and are ranged between 2 – 4 km and 100–1700 km respectively. Horizontal group velocities are found to be lesser in tropospheric region than stratospheric one, while the vertical group velocities showed the opposite nature in all the seasons. About 80–90% hodographs show the upward propagation of IGW in stratospheric region and the direction of horizontal wave propagation is not very clear. Vertical wavenumber spectra reveal the isotropic nature of the waves and agreed well with the universal spectrum of power law. The slopes reached canonical values (−3) in both the height regions for all the seasons. Kinetic energy variations in all the seasons show interesting facts about source regions in different seasons. Strong convection and wind shear along with tropical easterly jets are responsible for the generation of these waves in monsoon, whereas, sudden enhancement in meridional wind shear is the source mechanism during winter.

重力波不仅在将动量和能量传递到高层大气中起着重要作用，而且还极大地促进了不同的全球大气现象，例如Br​​ewer-Dobson循环以及行星波。重力波模型参数与实际观测值之间的较大差异已建议进行更多的观测研究，以获得更好的预测。在本文中，我们已在不同季节发射了80个GPS无线电探空仪（每个季节20个），以参数化热带海得拉巴站（北纬17.4°，东经78.5°）的惯性重力波（IGW）特征。纬向，经向风和温度波动的FFT分析表明，不管是否存在强潮和准两日波（QTDW），在该纬度上都产生了IGW。在对流层和平流层区域，季风和冬季振幅最大。Hodograph分析用于估计IGW参数。垂直和水平波长均未观察到明显的季节性变化，其范围分别为2-4 km和100-1700 km。发现对流层区域的水平群速度小于平流层区域的水平群速度，而垂直群速度在所有季节都显示出相反的性质。大约80-90％的航海图显示了IGW在平流层区域的向上传播，水平波的传播方向也不是很清楚。垂直波数谱揭示了波的各向同性性质，并且与幂律的通用谱很好地吻合。在所有季节中，两个高度区域的斜率均达到标准值（-3）。所有季节的动能变化都显示了有关不同季节源区域的有趣事实。强烈的对流和风切变以及热带东风急流是造成季风中这些波浪产生的原因，而子午风切变的突然增强是冬季的源机制。