LAUNCHXL2-RM46: ADC DAC example: was this made for a board with external memory?

I'm trying to build this example: ADC_DAC.zip.

It's for the RM46x. The following variables are declared in sys_main.c

uint32 adc1_EV_results[43200];
uint32 adc1_G1_results[43200];

and notification.c:

uint32    adc1_EV_results_copy[43200];
uint32    adc1_G1_results_copy[43200];

extern uint32 adc1_EV_results[43200];
extern uint32 adc1_G1_results[43200];

	int i = 0;

	if (channel == 0)
	{
		for (i=0; i<86400; i++)
		{
			adc1_EV_results_copy[i] = adc1_EV_results[i];
		}
	}
	else if (channel == 1)
	{
		for (i=0; i<86400; i++)
		{
			adc1_G1_results_copy[i] = adc1_G1_results[i];
		}

	}
	else
	{
		while(1);			// should never get here
	}

Why is the counter the double of the array lenghth?