get raw data

extract/aux_ebox.go

@@ -1,5 +1,7 @@
 package extract
 
+import "fmt"
+
 // 卫星时间起点 北京时间 2000-01-01 20:00:00
 var (
 	ReferenceTime2000 = 946728000
@@ -7,4 +9,86 @@ var (
 
 // 焦面电箱辅助数据 128 字节 (每 16 行原始图像数据为一组)
 type AuxFocalBox struct {
+	TransferTime      float32 // 执行转移时间 0.5us/bit
+	TrainingDone      byte    // 1B成功；0B失败
+	WorkMode          byte    // 工作模式 0B正常；1B故障
+	IntegralDirection byte    // 积分方向 1B正向；0B反向
+	PGAGain           byte    // PGA增益
+}
+
+func (ab *AuxFocalBox) Decode(data []byte) error {
+	byte0 := data[0] & 0b00111111
+	ab.TransferTime = float32(uint32(byte0)<<16|uint32(data[1])<<8|uint32(data[2])) * 0.5
+	ab.TrainingDone = data[3] & 0b10000000
+	ab.WorkMode = data[3] & 0b01000000
+	ab.IntegralDirection = data[3] & 0b00100000
+	ab.PGAGain = data[3] & 0b00011111
+	return nil
+}
+
+func (ab AuxFocalBox) String() string {
+	return fmt.Sprintf(
+		`执行转移时间：%f us\n
+		TrainingDone：%x\n
+		工作模式：%x\n
+		积分方向：%x\n
+		PGA增益：%s
+		`,
+		ab.TransferTime,
+		ab.TrainingDone,
+		ab.WorkMode,
+		ab.IntegralDirection,
+		ab.PGAGainValue(),
+	)
+}
+
+func (ab AuxFocalBox) PGAGainValue() string {
+	switch ab.PGAGain {
+	case 0b0000:
+		return "0.75x"
+	case 0b0001:
+		return "1.25x"
+	case 0b0010:
+		return "1.75x"
+	case 0b0011:
+		return "2.25x"
+	case 0b0100:
+		return "2.75x"
+	case 0b0101:
+		return "3.25x"
+	case 0b0110:
+		return "3.75x"
+	case 0b0111:
+		return "4.25x"
+	case 0b1000:
+		return "4.75x"
+	case 0b1001:
+		return "5.25x"
+	case 0b1010:
+		return "5.75x"
+	case 0b10000:
+		return "1x"
+	case 0b10001:
+		return "1.5x"
+	case 0b10010:
+		return "2x"
+	case 0b10011:
+		return "2.5x"
+	case 0b10100:
+		return "3x"
+	case 0b10101:
+		return "3.5x"
+	case 0b10110:
+		return "4x"
+	case 0b10111:
+		return "4.5x"
+	case 0b11000:
+		return "5x"
+	case 0b11001:
+		return "5.5x"
+	case 0b11010:
+		return "6x"
+	default:
+		return "unknown"
+	}
 }