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