+
+ static double radio_channel_to_frequency(int channel) {
+ return 434.550 + channel * 0.100;
+ }
+
+ static int[] ParseHex(String line) {
+ String[] tokens = line.split("\\s+");
+ int[] array = new int[tokens.length];
+
+ for (int i = 0; i < tokens.length; i++)
+ try {
+ array[i] = Integer.parseInt(tokens[i], 16);
+ } catch (NumberFormatException ne) {
+ return null;
+ }
+ return array;
+ }
+
+ static double meters_to_feet(double meters) {
+ return meters * (100 / (2.54 * 12));
+ }
+
+ static double meters_to_mach(double meters) {
+ return meters / 343; /* something close to mach at usual rocket sites */
+ }
+
+ static double meters_to_g(double meters) {
+ return meters / 9.80665;
+ }
+
+ static int checksum(int[] data, int start, int length) {
+ int csum = 0x5a;
+ for (int i = 0; i < length; i++)
+ csum += data[i + start];
+ return csum & 0xff;
+ }