Advanced Seismic Technology S-4 Registration of securities issued in business combination transactions

Exhibit 12.1

Geokinetics Inc. and Subsidiaries

Computation of Earnings to Fixed Charges

	2009			2008			2007			2006			2005
Computation of Earnings:
Net income (loss) before income taxes	$	10,917		$	10,254		$	(13,684	)	$	(942	)	$	(1,871	)
Add fixed charges (see below)	34,891			34,190			22,449			23,166			1,233
Earnings available to cover fixed charges	45,808			44,444			8,765			22,224			(638		)
Fixed charges:
Interest	$	9,123		$	6,992		$	9,265		$	474		$	441
Amortization of debt cost and discount	560			336			875			4,608			—
Interest portion of rentals (1)	25,208			26,862			12,309			7,260			759
Total fixed charges	34,891			34,190			22,449			23,166			1,233
Preference security dividend (2)	40,352			11,713			9,011			381			294
Total fixed charges and preferred stock dividends	$	75,243		$	45,903		$	31,460		$	23,547		$	1,527
Deficiency of earnings available to cover fixed charges	$	—		$	—		$	(13,684	)	$	(942	)	$	(1,871	)
Deficiency of earnings to cover fixed charges and preferred stock dividends	$	(29,435	)	$	(1,459	)	$	(22,695	)	$	(1,323	)	$	(2,165	)
Ratio of earnings to fixed charges	1.31			1.30			—			—			—
Ratio of earnings to fixed charges and preferred stock dividends	—			—			—			—			—