## 6 Estimating Data Volume

To estimate your data volume, you can use the following formulas:

### 6.1 DRX data rate

DRX datarate per beam:

*BW*_{MHz}× *N*_{pol} × *N*_{tunings} ×
0.9611 *MB*/*s*/*beam* |

where *BW*_{MHz} is the DRX bandwidth in MHz, *N*_{pol} is the number
of polarizations (2 by default), and *N*_{tunings} is the number of
tunings per beam (usually 2). Thus observing with two tunings and
using filter code 7 (19.6 MHz), two polarizations for an hour will
give a data set of 264.9 GB.

### 6.2 TBN datarate

TBN datarate:

*BW*_{kHz}× *N*_{pol}× *N*_{stands} × 1.952× 10^{−3} *MB*/*s* |

where *BW*_{kHz} is the TBN bandwidth in kHz, *N*_{pol} is the number
of polarizations (2 by default), and *N*_{stands} is the number of
stand used (usually 256). Thus observing with two tunings and
using filter code 7 (100 kHz) and two polarizations for an hour will
give a data set of 351.4 GB.