gyrocompass kalman filter for marine navigation

{"cid":"91223334","title":"Gyrocompass Kalman Filter Fiber Optic Inertial Navigation System FOG INS Half Sine Wave","imgUrl":"https:\/\/img.chinax.com\/nimg\/61\/7e\/efe7517dbd39cb6df807d346b631-200x200-1.jpg","attrs":{"Price":"$1000-$100000","Brand Name":"Star & Inertia Technology","Model Number":"","Minimum Order Quantity":"1 set","Delivery Time":"30 work days","Place of Origin":"China","Payment Terms":"T\/T","Supply Ability":"500 sets per year","Alignment time":"\u22645min","Position accuracy\/Pure inertia":"\u22642nm\/1h","Position accuracy\/Inertial navigation satellite combination":"better than satellite accuracy","Speed \u200b\u200baccuracy\/Pure inertia":"\u22641.5m\/s","Speed \u200b\u200baccuracy\/Inertial navigation satellite combination":"\u22640.2m\/s","Heading Accuracy\/Pure inertia":"\u22640.1\u00b0sec(L)","Heading Accuracy\/Satellite navigation combination":"\u22640.05\u00b0","Pitch & Roll Accuracy\/Pure inertia":"\u22640.03\u00b0","Pitch & Roll Accuracy\/Satellite navigation combination":"\u22640.02\u00b0","Dimensions":"130\u00d7130\u00d7110mm","Weight":"\uff1c2.2kg","Temperature":"-40\u2103~60\u2103","Input Voltage":"DC24V(\u00b125%)"}}

{"cid":"91224988","title":"High Precision Fiber Optic INS SI-FINS88S, Compact Size \u2264100\u00d7100\u00d7120mm, Weight 1.4Kg,for Aircraft & Marine Navigation","imgUrl":"https:\/\/img.chinax.com\/nimg\/3a\/88\/02aa13f8d8c0394a238de34599be-200x200-1.jpg","attrs":{"Brand Name":"SI","Model Number":"SI-FINS88S","Minimum Order Quantity":"1set","Delivery Time":"6-8 weeks","Productname":"Fiber Optic Inertial Navigation System","Application fields":"Aerospace, Marine, Land Vehicles","Bias Stability":"\u22640.15\u00b0\/h","Updaterate":"Real-time","Navigationtype":"Inertial Navigation","Pitch and roll":"\u22640.01\u00b0 (1\u03c3)","Payment Terms":"D\/A,L\/C,D\/P,T\/T,Western Union","Heading":"\u22640.05\u00b0 (1\u03c3)"}}