<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-03-28 -087 09:30:00.000"
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" >
2026.03.28 (087) 09:30:00</StartTime>
<SolarTerrestrialData>
<GyroFrequency Val="0.63" Model="IGRF 3.0" Altitude="300"/>
<DipAngle Val="-11.18" 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">
FF202608703280930009039031101000005018000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="32" >
<URSI ID="00" Val="7.200" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="3.338" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="24.031" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="1.550" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="30" Val="4.300" Name="foEs" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="4.150" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="81" Val="1.550" Name="fminE" Units="MHz" QL="/" DL="/" />
<URSI ID="20" Val="1.710" Name="foE" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="7.600" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="250.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="250.000" Name="h`F2" Units="km" QL="/" DL="/" />
<URSI ID="24" Val="109.000" Name="h`E" Units="km" QL="/" DL="/" />
<URSI ID="34" Val="105.000" Name="h`Es" Units="km" QL="/" DL="/" />
<URSI ID="90" Val="100.328" Name="hmE" Units="km" QL="/" DL="/" />
<URSI ID="83" Val="10.253" Name="yE" Units="km" QL="/" DL="/" />
<URSI ID="86" Val="0.100" Name="FF" Units="MHz" QL="/" DL="/" />
<URSI ID="88" Val="6.650" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="305.000" 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="1.721" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="4.200" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="4.200" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<URSI ID="92" Val="259.183" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="201.496" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="5.210" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<Custom Name="fminEs" Val="2.800" Description="Minimum frequency of Es-layer" Units="MHz" />
<URSI ID="94" Val="80.428" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="12.269" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="44.160" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="88.380" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="1.820" Name="B1" QL="/" DL="/" />
<URSI ID="32" Val="4.150" Name="fbEs" Units="MHz" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="3">
<Trace Type="standard" Layer="F2" Polarization="O" Num="62">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
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
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
255.000 250.000 250.833 251.667 252.500 253.333 254.167 255.000 250.000 250.000 255.000 255.000 255.000 255.000 255.000 255.000 255.000 265.000 265.000 265.000 265.000 265.000 265.000 265.000 265.000 270.000 270.000 270.000 270.000 270.000 270.000 271.667 273.333 275.000 275.000 275.000 280.000 280.000 280.000 285.000 285.000 290.000 290.000 290.000 290.000 295.000 295.000 300.000 305.000 305.000 305.000 310.000 315.000 320.000 325.000 330.588 337.827 347.573 361.406 382.573 419.016 496.604
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
0 0 0 0 0 0 0 57 63 60 60 63 54 0 54 54 63 48 51 0 0 54 57 57 60 51 51 57 57 63 66 0 0 63 63 63 63 63 63 48 66 54 48 63 63 63 63 60 60 63 63 66 63 63 63 69 72 66 69 63 60 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 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 1.171875 1.171875 0.390625
</TraceValueList>
</Trace>
<Trace Type="standard" Layer="E" Polarization="O" Num="4">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
1.55 1.6 1.65 1.7
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
109.000 110.516 112.281 114.396
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
0 51 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
</TraceValueList>
</Trace>
<Trace Type="standard" Layer="Es" Polarization="O" Num="31">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
2.8 2.85 2.9 2.95 3.0 3.05 3.1 3.15 3.2 3.25 3.3 3.35 3.4 3.45 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
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
115.000 120.000 105.000 105.000 105.000 115.000 105.000 105.000 105.000 105.000 105.000 110.000 115.000 105.000 110.000 120.000 110.000 108.333 106.667 105.000 105.000 105.000 115.000 115.000 113.750 112.500 111.250 110.000 112.500 115.000 120.000
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
0 66 78 0 75 69 84 84 87 81 81 0 72 87 72 69 69 0 0 78 0 75 63 63 0 0 0 75 0 69 63
</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 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
</TraceValueList>
</Trace>
</TraceList>
<ProfileList Num="1">
<Profile  Algorithm="NH" AlgorithmVersion="4.33" Type="vertical" >
<Tabulated Num="155">
<AltitudeList Type="float" Units="km" Description="Altitude above station level" >
90.0 95.0 100.0 100.328 105.0 110.0 110.153 115.0 119.977 120.0 125.0 129.802 130.0 135.0 140.0 145.0 150.0 155.0 160.0 165.0 170.0 175.0 180.0 185.0 190.0 195.0 200.0 205.0 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 259.183 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0 360.0 365.0 370.0 375.0 380.0 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 1.462 1.709 1.71 1.68 1.576 1.572 1.572 1.572 1.572 1.643 1.71 1.716 1.888 2.099 2.331 2.569 2.804 3.036 3.267 3.499 3.734 3.974 4.22 4.474 4.737 5.009 5.287 5.568 5.847 6.116 6.366 6.589 6.781 6.937 7.057 7.14 7.188 7.2 7.2 7.188 7.16 7.117 7.059 6.99 6.908 6.817 6.717 6.609 6.494 6.374 6.248 6.119 5.986 5.851 5.714 5.575 5.436 5.297 5.158 5.02 4.883 4.747 4.612 4.479 4.349 4.22 4.094 3.97 3.848 3.73 3.614 3.5 3.39 3.282 3.177 3.074 2.975 2.878 2.784 2.692 2.604 2.518 2.434 2.353 2.274 2.198 2.124 2.053 1.983 1.916 1.851 1.789 1.728 1.669 1.612 1.557 1.504 1.452 1.403 1.354 1.308 1.263 1.22 1.178 1.137 1.098 1.06 1.023 0.988 0.954 0.921 0.889 0.858 0.829 0.8 0.772 0.746 0.72 0.695 0.671 0.648 0.625 0.603 0.582 0.562 0.543 0.524 0.506 0.488 0.471 0.455 0.439 0.424 0.409 0.395 0.381 0.368 0.355 0.343 0.331 0.319 0.308 0.298 0.287 0.277 0.268 0.258 0.249 0.241 0.232 0.224 0.217 0.209 0.202

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="2" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="1.71" PeakHeight="100.328" Num="3" Error="4.068">
-14.646 5.361 -1.043
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="1.71" EndFrequency="7.2" PeakHeight="259.183" Num="5" zHalfNm="201.496" Error="2.979">
-123.954 -6.563 0.33 2.346 -1.54
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="29.474" Depth="0.138"/>
<TopsideChapman PeakHeight="259.183" PeakDensity="643176.2" PeakScaleHeight="44.16" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
