Objective: APPHi is aimed to be the first pipeline in the data procesing of TAOS-II data. The output will provide the following data analysis pipelines with a reliable photometry and enhenced SNR.

APPHi code description Developed in C language, APPHi is a code made up of two principal programs APPHi\_field and APPHi\_star, devoted to get the photometry of astronomical data stored in FITS and HDF5 format, respectively. Both codes are built in accord with the flow charts presented in figure...

The APPHi output is one HDF5 file per star found in the field. It contains the image of the star in each frame, centroid positions, and lightcurves. The HDF Hierarchical Data Format is still not widely used in astronomy yet, it is an open format very suitable to deal with large collections of data. For example, a single HDF5 file can contain not only a data cube of two-dimensional images of a star, but also all the possible one-dimensional light curves extracted and all the meta data concerning to that object.

FILE_FITS: this structure loads into RAM memory the information relative to the reading of fits files. It consists of three elements: int dim, an integer that contains the dimension (in bytes) of the read file; long int naxes[3], a dynamic array which stores the length of the file in the $x$, $y$ and $z$ dimensions; type *data (where ``type'' means long int, int, float or double, as appropriate), a static array that stores all the information of the fits read file.

HDF5_DATA_type: this is an analog structure to \emph{FILE\_FITS} but for the case when the input is a \emph{HDF5} file.

MASTER_DATA: intended to temporarily store and reuse the obtained results from reduction process. This structure deals with two data Long int naxes[2], which gives the length of the dimensions x, y and float *data provides the resulting data.

STAR_BIN: specifically designed to store the data used in the processing of the field star in the code APPHi-field, contains the star positions $x,y$ (int *x, int *y); the number of identified stars; and the field information to process the identification of the stars (int *bin).

STAR_DATA: this is the main structure in the APPHi library, it stores the whole data that will be written to the output file namely: file name (char name[ ]), star position (int x, int y) and the length of the files (long int naxes[ ]); the light curves resulting from the aperture and the differential photometry (float *curve and float *diff, respectively); the curves from the Shift & Add processing and the signal to noise curve (float *SNR).

APPHi contains 40 functions, some of which have an obvious meaning and are usual in C programming while others (8) are to perform the data reduction, the star location in the field and the photometry.

APPHi has been tested under Centos and Ubuntu Linux distributios only, however, it must run in any other.