#! /bin/bash

packet_size=1280
packets_per_dataset=50

for packet in $(seq 0 24); do
    for id in $(seq 0 15); do
        name=$(ls *$id.dat | grep -P "_0?$id.dat")
        dd  if=$name of="roof_test.raw" bs=$packet_size count=$packets_per_dataset skip=$((packet * $packets_per_dataset))  oflag=append conv=notrunc
    done
done