<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-03-26 -085 08:50:00.000"
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 22 0 0 0 0 0 0 0 0 1 0 "/>
<Comments>AR.5002.44 Confidence: 75%</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" >
2026.03.26 (085) 08:50:00</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">
FF202608503260850009039031101000005018000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="29" >
<URSI ID="00" Val="5.650" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="3.148" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="17.786" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="1.650" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="30" Val="4.100" Name="foEs" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="3.650" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="6.050" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="265.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="265.000" Name="h`F2" Units="km" QL="/" DL="/" />
<URSI ID="34" Val="110.000" Name="h`Es" 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="0.100" Name="FF" Units="MHz" QL="/" DL="/" />
<URSI ID="88" Val="5.150" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="331.667" 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="0.871" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="3.650" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="3.650" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<URSI ID="92" Val="299.428" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="237.152" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="3.826" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<Custom Name="fminEs" Val="1.650" Description="Minimum frequency of Es-layer" Units="MHz" />
<URSI ID="94" Val="88.942" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="8.009" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="48.511" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="76.530" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="3.690" Name="B1" QL="/" DL="/" />
<URSI ID="32" Val="3.650" Name="fbEs" Units="MHz" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="2">
<Trace Type="standard" Layer="F2" Polarization="O" Num="41">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
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
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
265.000 265.000 265.000 270.000 275.000 275.625 276.250 276.875 277.500 278.125 278.750 279.375 280.000 280.000 281.667 283.333 285.000 290.000 292.500 295.000 297.500 300.000 300.000 305.000 310.000 315.000 315.000 315.000 320.000 325.000 331.667 338.333 345.000 350.000 360.000 365.000 378.396 396.906 424.145 468.197 551.574
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
60 0 66 63 54 0 0 0 0 0 0 0 72 63 0 0 66 72 0 0 0 69 54 63 69 69 69 72 69 63 0 0 72 72 72 69 69 69 54 51 48
</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 -1.953125 -1.953125 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 1.171875 1.171875 1.171875 1.953125
</TraceValueList>
</Trace>
<Trace Type="standard" Layer="Es" Polarization="O" Num="50">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
1.65 1.7 1.75 1.8 1.85 1.9 1.95 2.0 2.05 2.1 2.15 2.2 2.25 2.3 2.35 2.4 2.45 2.5 2.55 2.6 2.65 2.7 2.75 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
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
110.000 105.000 105.000 107.500 110.000 112.500 115.000 117.500 120.000 115.000 114.231 113.462 112.692 111.923 111.154 110.385 109.615 108.846 108.077 107.308 106.538 105.769 105.000 106.667 108.333 110.000 105.000 100.000 102.500 105.000 107.500 110.000 110.000 105.000 102.500 100.000 107.500 115.000 115.000 115.000 115.000 110.000 105.000 102.500 100.000 100.000 100.000 100.000 100.000 100.000
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
54 60 63 0 0 0 0 0 63 63 0 0 0 60 0 0 0 0 0 0 60 0 66 0 0 0 0 0 66 72 0 0 0 69 0 78 0 60 60 0 57 57 0 0 0 0 0 0 0 63
</TraceValueList>
<TraceValueList Name="DopplerShift" Type="float" Units="Hz" NoValue="99.0" Description="Doppler Frequency Shift" >
0.390625 0.390625 -0.390625 -1.171875 -1.953125 -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
</TraceValueList>
</Trace>
</TraceList>
<ProfileList Num="1">
<Profile  Algorithm="NH" AlgorithmVersion="4.33" Type="vertical" >
<Tabulated Num="166">
<AltitudeList Type="float" Units="km" Description="Altitude above station level" >
90.434 95.0 100.0 105.0 110.0 115.0 120.0 125.0 130.0 130.995 135.0 140.0 145.0 150.0 151.991 155.0 160.0 165.0 170.0 172.986 175.0 180.0 185.0 190.0 195.0 200.0 205.0 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 299.428 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0 360.0 365.0 370.0 375.0 380.0 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0 850.0 855.0 860.0 865.0 870.0 875.0 880.0 885.0 890.0 895.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.579 0.755 0.843 0.871 0.857 0.813 0.734 0.608 0.574 0.574 0.574 0.574 0.574 0.574 0.617 0.687 0.758 0.829 0.871 0.916 1.05 1.216 1.403 1.604 1.817 2.045 2.29 2.558 2.852 3.171 3.51 3.852 4.176 4.465 4.714 4.923 5.097 5.241 5.359 5.454 5.528 5.584 5.622 5.644 5.65 5.65 5.643 5.625 5.597 5.56 5.514 5.46 5.4 5.333 5.26 5.182 5.1 5.015 4.926 4.834 4.74 4.644 4.547 4.448 4.349 4.25 4.151 4.051 3.953 3.854 3.757 3.66 3.565 3.471 3.378 3.287 3.197 3.108 3.022 2.937 2.854 2.772 2.692 2.615 2.538 2.464 2.392 2.321 2.252 2.185 2.12 2.056 1.994 1.934 1.875 1.818 1.762 1.709 1.656 1.605 1.556 1.508 1.461 1.416 1.372 1.33 1.288 1.248 1.21 1.172 1.135 1.1 1.065 1.032 1.0 0.968 0.938 0.909 0.88 0.852 0.826 0.8 0.774 0.75 0.726 0.704 0.681 0.66 0.639 0.619 0.599 0.58 0.562 0.544 0.527 0.511 0.494 0.479 0.464 0.449 0.435 0.421 0.408 0.395 0.382 0.37 0.358 0.347 0.336 0.325 0.315 0.305 0.296 0.286 0.277 0.268 0.26 0.252 0.244 0.236 0.228 0.221 0.214 0.207 0.201

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="2" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="0.871" PeakHeight="110.0" Num="3" Error="0.0">
-25.854 7.33 -1.042
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="0.871" EndFrequency="5.65" PeakHeight="299.428" Num="5" zHalfNm="237.152" Error="1.877">
-139.864 22.703 -13.195 5.725 -1.811
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="62.986" Depth="0.297"/>
<TopsideChapman PeakHeight="299.428" PeakDensity="396060.78" PeakScaleHeight="48.511" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
