<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-03-18 -077 19:20:00.000"
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="1 2 0 0 0 0 0 0 0 11 0 0 0 0 0 0 0 0 0 0 "/>
<Comments>AR.5002.44 Confidence: 100%</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" >
2026.03.18 (077) 19:20:00</StartTime>
<SolarTerrestrialData>
<GyroFrequency Val="0.63" Model="IGRF 3.0" Altitude="300"/>
<DipAngle Val="-11.17" 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">
FF202607703181920009039031101000005018000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="28" >
<URSI ID="00" Val="11.900" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="2.785" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="33.143" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="2.450" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="3.500" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="81" Val="2.450" Name="fminE" Units="MHz" QL="/" DL="/" />
<URSI ID="20" Val="2.760" Name="foE" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="12.250" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="230.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="230.000" Name="h`F2" Units="km" QL="/" DL="/" />
<URSI ID="24" Val="101.848" Name="h`E" Units="km" QL="/" DL="/" />
<URSI ID="90" Val="98.516" Name="hmE" Units="km" QL="/" DL="/" />
<URSI ID="83" Val="8.345" Name="yE" Units="km" QL="/" DL="/" />
<URSI ID="86" Val="0.150" Name="FF" Units="MHz" QL="/" DL="/" />
<URSI ID="88" Val="11.300" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="435.000" 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="2.609" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="3.500" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="3.500" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<URSI ID="92" Val="346.140" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="265.014" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="9.663" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="113.136" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="48.045" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="62.835" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="121.500" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="1.920" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="2">
<Trace Type="standard" Layer="F2" Polarization="O" Num="169">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
3.5 3.55 3.6 3.65 3.7 3.75 3.8 3.85 3.9 3.95 4.0 4.05 4.1 4.15 4.2 4.25 4.3 4.35 4.4 4.45 4.5 4.55 4.6 4.65 4.7 4.75 4.8 4.85 4.9 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
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
230.000 230.000 232.500 235.000 235.000 238.333 241.667 245.000 245.000 247.500 250.000 255.000 255.000 255.000 256.667 258.333 260.000 260.000 265.000 270.000 275.000 275.000 275.000 275.000 280.000 280.000 283.333 286.667 290.000 290.000 290.000 290.000 295.000 295.000 295.000 295.000 295.000 295.000 300.000 305.000 302.500 300.000 300.000 305.000 305.000 305.000 305.000 310.000 310.000 310.000 310.000 310.000 310.000 310.000 315.000 315.000 315.000 315.000 315.000 315.000 315.000 316.667 318.333 320.000 320.000 320.000 320.000 320.000 325.000 325.000 325.000 325.000 330.000 330.000 330.000 330.000 331.667 333.333 335.000 336.667 338.333 340.000 340.714 341.429 342.143 342.857 343.571 344.286 345.000 345.000 350.000 350.000 350.000 350.000 350.000 350.000 355.000 355.000 355.000 355.000 355.000 355.000 355.000 355.000 360.000 360.000 360.000 360.000 360.000 365.000 365.000 365.000 365.000 365.000 370.000 370.000 370.000 370.000 370.000 370.000 370.000 372.500 375.000 375.000 375.000 380.000 380.000 380.000 380.000 380.000 383.000 386.000 389.000 392.000 395.000 395.000 395.000 395.000 400.000 400.000 400.000 405.000 406.667 408.333 410.000 410.000 415.000 415.000 420.000 420.000 425.000 425.000 430.000 435.000 435.000 440.000 435.000 450.000 455.000 460.000 465.000 470.000 478.634 488.952 501.502 517.096 536.993 563.259 599.537
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
57 54 0 60 54 0 0 63 66 0 60 54 54 63 0 0 63 0 0 66 60 54 0 0 60 63 0 0 48 63 0 66 57 0 0 0 66 57 0 0 54 63 60 69 72 66 60 63 0 66 72 69 69 60 60 69 72 72 63 57 48 0 0 66 0 57 48 48 69 0 60 57 72 72 66 69 0 69 0 0 0 66 0 0 0 0 54 0 75 78 78 81 81 81 81 78 75 78 78 75 0 72 72 75 66 0 69 69 66 63 69 72 75 75 75 75 75 75 72 72 69 0 69 0 66 69 69 72 57 66 0 0 60 0 54 57 60 60 45 54 60 48 0 0 51 60 57 60 60 54 54 54 57 54 45 48 45 51 54 54 54 51 54 51 0 0 0 0 0
</TraceValueList>
<TraceValueList Name="DopplerShift" Type="float" Units="Hz" NoValue="99.0" Description="Doppler Frequency Shift" >
0.390625 0.390625 -0.390625 -0.390625 0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -1.171875 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 0.390625 -0.390625 0.390625 -0.390625 -0.390625 -0.390625 0.390625 -0.390625 0.390625 -0.390625 0.390625 -0.390625 -0.390625 -0.390625 -0.390625 0.390625 -0.390625 -1.171875 0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 -0.390625 0.390625 0.390625 0.390625 0.390625 -0.390625 -0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 -0.390625 0.390625 -2.734375 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 -0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 1.171875 0.390625 0.390625 0.390625 0.390625 -1.171875 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 1.171875 0.390625 0.390625 0.390625 0.390625 -1.171875 -1.171875 -0.390625 0.390625
</TraceValueList>
</Trace>
<Trace Type="standard" Layer="E" Polarization="O" Num="7">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
2.45 2.5 2.55 2.6 2.65 2.7 2.75
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
101.848 102.820 103.949 105.302 107.001 109.321 113.127
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
60 0 57 0 0 0 51
</TraceValueList>
<TraceValueList Name="DopplerShift" Type="float" Units="Hz" NoValue="99.0" Description="Doppler Frequency Shift" >
-0.390625 -0.390625 0.390625 -0.390625 0.390625 -0.390625 0.390625
</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" >
90.0 95.0 98.516 100.0 103.562 105.0 108.607 110.0 113.653 115.0 120.0 125.0 130.0 135.0 140.0 145.0 150.0 155.0 160.0 165.0 170.0 175.0 180.0 185.0 190.0 195.0 200.0 205.0 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 346.14 350.0 355.0 360.0 365.0 370.0 375.0 380.0 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0 850.0 855.0 860.0 865.0 870.0 875.0 880.0 885.0 890.0 895.0 900.0 905.0 910.0 915.0 920.0 925.0 930.0 935.0 940.0 945.0 950.0 955.0 960.0 965.0 970.0 975.0 980.0 985.0 990.0 995.0 1000.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 2.5 2.76 2.749 2.629 2.629 2.629 2.665 2.76 2.79 2.902 3.014 3.127 3.241 3.358 3.477 3.598 3.724 3.853 3.987 4.125 4.269 4.418 4.574 4.737 4.907 5.086 5.273 5.47 5.677 5.895 6.125 6.368 6.623 6.891 7.173 7.467 7.773 8.089 8.414 8.743 9.074 9.402 9.724 10.035 10.33 10.607 10.862 11.093 11.297 11.473 11.62 11.736 11.822 11.876 11.899 11.9 11.896 11.878 11.846 11.802 11.746 11.679 11.601 11.514 11.418 11.314 11.202 11.083 10.958 10.827 10.691 10.55 10.406 10.258 10.106 9.953 9.797 9.639 9.48 9.32 9.159 8.997 8.835 8.674 8.512 8.352 8.192 8.033 7.874 7.718 7.562 7.408 7.256 7.105 6.957 6.81 6.665 6.522 6.381 6.242 6.106 5.972 5.839 5.71 5.582 5.456 5.333 5.212 5.094 4.977 4.863 4.751 4.642 4.534 4.429 4.326 4.225 4.126 4.029 3.934 3.842 3.751 3.662 3.575 3.491 3.408 3.326 3.247 3.169 3.094 3.019 2.947 2.876 2.807 2.74 2.674 2.609 2.546 2.485 2.425 2.366 2.309 2.253 2.198 2.145 2.093 2.042 1.992 1.944 1.897 1.85 1.805 1.761 1.718 1.677 1.636 1.596 1.557 1.519 1.482 1.446 1.41 1.376 1.342 1.309 1.277 1.246 1.216 1.186 1.157 1.128 1.101 1.074 1.048 1.022 0.997 0.972 0.949 0.925 0.903 0.881 0.859 0.838 0.817 0.797 0.778 0.759

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="2" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="2.76" PeakHeight="98.516" Num="3" Error="1.412">
-12.509 5.17 -1.177
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="2.76" EndFrequency="11.9" PeakHeight="346.14" Num="5" zHalfNm="265.014" Error="2.226">
-191.943 -36.358 -7.769 3.084 0.499
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="15.137" Depth="0.131"/>
<TopsideChapman PeakHeight="346.14" PeakDensity="1756947.9" PeakScaleHeight="62.835" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
