If I taketheexampleoffexploringthesubsurfaceocean, wedon't seetheocean, soit's alwaysanindirectGerman, soit's bettertohavemeasurementfromdifferentinstrumenttomakesureweknowexactlywhatwearetalkingabout.
Butfiguringouthowtopowertheinstrumentsandthespacecraftwas a challenge.