Spacecraft Recovery & Remote Sensing, Volume. 46, Issue 4, 73(2025)

Temporal Spectral Variations of Forest Vegetation Based on HST Index and HDT Feature Space

Tianyu ZHAO and Jia TIAN*
Author Affiliations
  • School of Instrumentation and Optoelectronic Engineering, Beijing University of Aeronautics and Astronautics, Beijing 100191, China
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    Figures & Tables(17)
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    • Table 1. Parameter settings for the PROSAIL model

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      Table 1. Parameter settings for the PROSAIL model

      参数3月5月7月9月11月
      注:N、$ C\mathrm{_{ab}} $、LAI分布类型为高斯分布,表示为(平均值,标准差)。
      叶片结构参数N(1.25,0.083)(1.9,0.133)(2.15,0.117)(2.65,0.117)(2.65,0.117)
      叶绿素含量${C_{{\text{ab}}}}$/(μg·cm−2)(30.0,3.333)(40.0,3.333)(50.0,3.333)(40.0,3.333)(20.0,3.333)
      胡萝卜素含量${C_{{\text{ar}}}}$/(μg·cm−2)9.3
      褐色素浓度${C_{{\text{brown}}}}$00.10.10.30.4
      等效水厚度${C_{\text{w}}}$/(g·cm−2)0.0050.0080.0130.0100.005
      干物质含量${C_{\text{m}}}$/(g·cm−2)0.0040.0050.0060.0070.007
      叶面积指数LAI(1.75,0.417)(4.5,0.5)(7.5,0.5)(5.5,0.5)(2.5,0.5)
      热点参数Hot_spot0.1
      叶倾角类型LIDF球形分布
      天空散射系数skyl0.2
      土壤类型Soil_type湿土
    • Table 2. Parameter settings for sensitivity analysis of the PROSAIL model

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      Table 2. Parameter settings for sensitivity analysis of the PROSAIL model

      参数名称固定值取值范围及步长
      叶片结构参数N2.151.0~2.35, 0.15
      叶绿素含量${C_{{\text{ab}}}}$/(μg·cm−2)5020~65, 5
      胡萝卜含量$ C_{\mathrm{ar}} $/(μg·cm−2)9.3
      褐色素浓度${C_{{\text{brown}}}}$0.10.0~0.45, 0.05
      等效水厚度${C_{\text{w}}}$/(g·cm−2)0.001 30.001~0.010, 0.001
      干物质含量${C_{\text{m}}}$/(g·cm−2)0.0060.001~0.010, 0.001
      叶面积指数LAI7.50.7~6, 0.6
      热点参数Hot_spot0.1
      叶倾角类型LIDF球型分布
      土壤类型Soil_type湿土
      天空散射因子Skyl0.2
    • Table 3. Physiological and biochemical parameter settings for 8 sets of time-series simulated spectra

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      Table 3. Physiological and biochemical parameter settings for 8 sets of time-series simulated spectra

      时间参数光谱1光谱2光谱3光谱4光谱5光谱6光谱7光谱8
      注:胡萝卜素含量、褐色素浓度等生理生化参量取值情况同表1
      3月叶片结构参数N1.231.240.931.211.141.061.291.29
      叶绿素含量${C_{{\text{ab}}}}$/(μg·cm−2)29.0131.0927.2030.9427.429.8230.3832.71
      叶面积指数LAI1.861.821.531.862.562.061.421.21
      5月叶片结构参数N1.771.881.822.061.931.791.902.0
      叶绿素含量${C_{{\text{ab}}}}$/(μg·cm−2)44.8039.4239.6837.9441.2136.3738.1444.81
      叶面积指数LAI4.104.194.264.715.174.785.034.81
      7月叶片结构参数N2.052.212.272.022.292.302.152.27
      叶绿素含量${C_{{\text{ab}}}}$/(μg·cm−2)51.3144.9953.6747.0449.1054.2750.6149.37
      叶面积指数LAI6.877.358.057.117.917.057.267.48
      9月叶片结构参数N2.922.562.882.552.682.582.632.85
      叶绿素含量${C_{{\text{ab}}}}$/(μg·cm−2)38.5234.2036.0337.6439.8542.4835.3138.81
      叶面积指数LAI6.114.705.515.845.575.405.815.25
      11月叶片结构参数N2.612.552.792.832.492.402.602.43
      叶绿素含量${C_{{\text{ab}}}}$/(μg·cm−2)17.4520.1219.0018.9721.1822.3322.7220.55
      叶面积指数LAI2.662.223.152.541.352.422.582.57
    • Table 4. Statistical table of growth rate for \begin{document}$ 5\mathrm{HST}_{\text{G}} $\end{document} in Langya Mountain, Laojia Mountain, Tieshansi Forest Farm

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      Table 4. Statistical table of growth rate for \begin{document}$ 5\mathrm{HST}_{\text{G}} $\end{document} in Langya Mountain, Laojia Mountain, Tieshansi Forest Farm

      日期中位数增长率离散程度增长率
      04-061.932.192.301.601.221.42
      05-010.340.430.18−0.50−0.24−0.39
      06-05−0.29−0.28−0.230.08−0.08−0.19
      07-30−0.08−0.17−0.12−0.13−0.280.01
      09-03−0.15−0.11−0.12−0.190.07−0.11
      10-03−0.34−0.22−0.17−0.14−0.290.10
      11-07−0.16−0.21−0.311.120.490.21
    • Table 5. Statistical table of growth rate for \begin{document}$ \mathrm{HST}_{\text{NIR}} $\end{document} in Langya Mountain, Laojia Mountain, Tieshansi Forest Farm

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      Table 5. Statistical table of growth rate for \begin{document}$ \mathrm{HST}_{\text{NIR}} $\end{document} in Langya Mountain, Laojia Mountain, Tieshansi Forest Farm

      日期中位数增长率离散程度增长率
      04-061.220.881.231.311.161.46
      05-010.850.950.72−0.090.09−0.01
      06-050.020.060.09−0.20−0.020.12
      07-30−0.17−0.14−0.150.01−0.20−0.13
      09-03−0.21−0.14−0.10−0.03−0.03−0.02
      10-03−0.34−0.26−0.290.220.210.32
      11-07−0.26−0.33−0.45−0.31−0.19−0.42
    • Table 6. Temporal variation characteristics of forest vegetation spectra

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      Table 6. Temporal variation characteristics of forest vegetation spectra

      时期3月—5月快速生长期6月—8月成熟期9月—11月衰落期
      绿峰值快速上升缓慢下降较成熟期快速下降
      绿峰值离散度先上升后下降小于5月大于3月先减小后增大
      近红外波段反射率快速上升缓慢下降较成熟期快速下降
      近红外反射率离散度先上升后不变小于5月大于3月先增大后减小
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    Tianyu ZHAO, Jia TIAN. Temporal Spectral Variations of Forest Vegetation Based on HST Index and HDT Feature Space[J]. Spacecraft Recovery & Remote Sensing, 2025, 46(4): 73

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    Paper Information

    Category: Remote Sensing Information Processing Technology

    Received: Dec. 23, 2024

    Accepted: --

    Published Online: Sep. 12, 2025

    The Author Email: Jia TIAN (tianjia@buaa.edu.cn)

    DOI:10.3969/j.issn.1009-8518.2025.04.007

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