<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-10-11 -284 18:40:00.000"
URSICode="SAA0K"
StationName="SaoLuis"
GeoLatitude="-2.6"
GeoLongitude="315.8"
Source="Ionosonde"
SourceType="DPS-4"
ScalerType="auto">
<SystemInfo UMLStationID="903">
<FrequencyStepping StartFrequency="1.0" StopFrequency="18.0">
<LinearStepping Step="0.05" Units="MHz" />
</FrequencyStepping>
<RangeStepping StartRange="80.0" StopRange="1360.0" >
<LinearStepping Step="5.0" Units="km" />
</RangeStepping>
<AutoScaler Name="Artist5" Version="500200" ArtistFlags="2 2 0 0 0 0 0 0 0 11 0 0 0 0 0 0 0 0 1 0 "/>
<Comments>AR.5002.44 Confidence: 90% PACIFIC flags: One of F2 cusps was derived from the other</Comments>
<ContactPerson>
<Name>Dr. Mangalathayil Ali Abdu</Name>
<Affiliation>INPE, Division of Aeronomy</Affiliation>
<Address>Av dos Astronautas, 1.758 Jd. Granja - CEP: 12227-010 Sao Jose dos Campos - SP Brasil</Address>
<Email>maabdu@dae.inpe.br</Email>
</ContactPerson>
<StartTime Format="yyyy.MM.dd (DDD) HH:mm:ss" TimeZone="Coordinated Universal Time" >
2026.10.11 (284) 18:40:00</StartTime>
<SolarTerrestrialData>
<GyroFrequency Val="0.63" Model="IGRF 3.0" Altitude="300"/>
<DipAngle Val="-11.38" Model="IGRF 3.0" Altitude="300"/>
<DeclinationAngle Val="-19.74" Model="IGRF 3.0" Altitude="300"/>
<SunSpotNumber Val="-1.0" Status="predicted"/>
</SolarTerrestrialData>
<DigisondePreface Format="FF">
FF202628410111840009039031101000005018000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="25" >
<URSI ID="00" Val="12.550" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="2.693" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="33.793" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="4.950" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="4.950" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="13.100" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="300.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="300.000" Name="h`F2" Units="km" QL="/" DL="/" />
<URSI ID="90" Val="110.000" Name="hmE" Units="km" QL="/" DL="/" />
<URSI ID="83" Val="20.000" Name="yE" Units="km" QL="/" DL="/" />
<URSI ID="86" Val="0.250" Name="FF" Units="MHz" QL="/" DL="/" />
<URSI ID="88" Val="12.000" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="465.000" Name="h`(fMUF)" Units="km" QL="/" DL="/" />
<Custom Name="dlt foF2" Val="0.000" Description="Adjustment to the scaled foF2 during profile inversion" Units="MHz" />
<Modeled Name="foEp" Val="2.741" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="4.950" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="4.950" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<URSI ID="92" Val="352.266" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="278.416" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="10.314" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="100.931" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="48.244" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="55.189" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="133.780" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="1.090" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="1">
<Trace Type="standard" Layer="F2" Polarization="O" Num="153">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
4.95 5.0 5.05 5.1 5.15 5.2 5.25 5.3 5.35 5.4 5.45 5.5 5.55 5.6 5.65 5.7 5.75 5.8 5.85 5.9 5.95 6.0 6.05 6.1 6.15 6.2 6.25 6.3 6.35 6.4 6.45 6.5 6.55 6.6 6.65 6.7 6.75 6.8 6.85 6.9 6.95 7.0 7.05 7.1 7.15 7.2 7.25 7.3 7.35 7.4 7.45 7.5 7.55 7.6 7.65 7.7 7.75 7.8 7.85 7.9 7.95 8.0 8.05 8.1 8.15 8.2 8.25 8.3 8.35 8.4 8.45 8.5 8.55 8.6 8.65 8.7 8.75 8.8 8.85 8.9 8.95 9.0 9.05 9.1 9.15 9.2 9.25 9.3 9.35 9.4 9.45 9.5 9.55 9.6 9.65 9.7 9.75 9.8 9.85 9.9 9.95 10.0 10.05 10.1 10.15 10.2 10.25 10.3 10.35 10.4 10.45 10.5 10.55 10.6 10.65 10.7 10.75 10.8 10.85 10.9 10.95 11.0 11.05 11.1 11.15 11.2 11.25 11.3 11.35 11.4 11.45 11.5 11.55 11.6 11.65 11.7 11.75 11.8 11.85 11.9 11.95 12.0 12.05 12.1 12.15 12.2 12.25 12.3 12.35 12.4 12.45 12.5 12.55
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
300.000 301.250 302.500 303.750 305.000 305.000 305.909 306.818 307.727 308.636 309.545 310.455 311.364 312.273 313.182 314.091 315.000 315.000 315.000 315.000 315.000 315.000 315.000 320.000 320.000 320.000 320.000 325.000 325.000 325.000 325.000 330.000 330.000 330.000 330.000 330.000 335.000 335.000 335.000 335.000 335.000 335.000 340.000 341.000 342.000 343.000 344.000 345.000 346.029 347.059 348.088 349.118 350.147 351.176 352.206 353.235 354.265 355.294 356.324 357.353 358.382 359.412 360.441 361.471 362.500 363.529 364.559 365.588 366.618 367.647 368.676 369.706 370.735 371.765 372.794 373.824 374.853 375.882 376.912 377.941 378.971 380.000 381.029 382.059 383.088 384.118 385.147 386.176 387.206 388.235 389.265 390.294 391.324 392.353 393.382 394.412 395.441 396.471 397.500 398.529 399.559 400.588 401.618 402.647 403.676 404.706 405.735 406.765 407.794 408.824 409.853 410.882 411.912 412.941 413.971 415.000 415.000 418.750 422.500 426.250 430.000 430.000 430.000 430.000 430.000 435.000 435.000 435.000 440.000 440.000 445.000 445.000 445.000 450.000 450.000 450.000 455.000 460.000 460.000 460.000 465.000 465.000 470.000 475.000 480.000 483.756 488.052 493.014 498.810 505.670 513.915 524.014 536.668
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 78 78 78 72 66 0 72 78 78 78 78 81 81 78 78 81 78 78 0 0 78 78 75 69 0 0 0 0 0 54 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 63 60 0 0 0 54 0 66 66 69 63 66 66 63 66 57 63 66 60 69 66 66 60 69 63 54 60 63 60 54 0 51 0 0 0 0 0 0
</TraceValueList>
<TraceValueList Name="DopplerShift" Type="float" Units="Hz" NoValue="99.0" Description="Doppler Frequency Shift" >
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</TraceValueList>
</Trace>
</TraceList>
<ProfileList Num="1">
<Profile  Algorithm="NH" AlgorithmVersion="4.33" Type="vertical" >
<Tabulated Num="188">
<AltitudeList Type="float" Units="km" Description="Altitude above station level" >
89.592 90.0 95.0 100.0 105.0 110.0 114.408 115.0 118.815 120.0 123.223 125.0 130.0 135.0 140.0 145.0 150.0 155.0 160.0 165.0 170.0 175.0 180.0 185.0 190.0 195.0 200.0 205.0 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 352.266 355.0 360.0 365.0 370.0 375.0 380.0 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0 850.0 855.0 860.0 865.0 870.0 875.0 880.0 885.0 890.0 895.0 900.0 905.0 910.0 915.0 920.0 925.0 930.0 935.0 940.0 945.0 950.0 955.0 960.0 965.0 970.0 975.0 980.0 985.0 990.0 995.0 1000.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.234 1.841 2.373 2.652 2.741 2.618 2.618 2.618 2.651 2.741 2.821 3.017 3.193 3.358 3.518 3.676 3.833 3.989 4.147 4.307 4.469 4.634 4.802 4.974 5.15 5.33 5.514 5.703 5.897 6.097 6.302 6.512 6.729 6.951 7.18 7.415 7.657 7.905 8.159 8.42 8.688 8.962 9.242 9.528 9.819 10.115 10.414 10.715 11.015 11.311 11.598 11.869 12.113 12.317 12.465 12.542 12.55 12.547 12.527 12.488 12.432 12.36 12.274 12.173 12.06 11.936 11.802 11.657 11.505 11.345 11.179 11.006 10.829 10.648 10.463 10.275 10.085 9.893 9.7 9.506 9.312 9.118 8.924 8.731 8.54 8.35 8.161 7.974 7.79 7.607 7.427 7.25 7.075 6.903 6.733 6.567 6.403 6.243 6.085 5.931 5.78 5.632 5.486 5.344 5.206 5.07 4.937 4.807 4.68 4.556 4.435 4.317 4.202 4.09 3.98 3.873 3.769 3.667 3.568 3.471 3.377 3.285 3.196 3.108 3.024 2.941 2.86 2.782 2.706 2.632 2.559 2.489 2.42 2.354 2.289 2.226 2.164 2.104 2.046 1.99 1.935 1.881 1.829 1.778 1.729 1.681 1.635 1.589 1.545 1.502 1.46 1.42 1.38 1.342 1.305 1.268 1.233 1.199 1.166 1.133 1.102 1.071 1.041 1.012 0.984 0.956 0.93 0.904 0.879 0.854 0.83 0.807 0.785 0.763 0.742 0.721 0.701 0.681 0.662 0.644 0.626 0.608 0.591 0.575 0.559 0.543 0.528

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="2" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="2.741" PeakHeight="110.0" Num="3" Error="0.0">
-29.961 12.363 -2.81
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="2.741" EndFrequency="12.55" PeakHeight="352.266" Num="5" zHalfNm="278.416" Error="3.67">
-182.683 -61.452 13.53 0.635 0.927
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="13.223" Depth="0.123"/>
<TopsideChapman PeakHeight="352.266" PeakDensity="1954125.2" PeakScaleHeight="55.189" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
