<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-03-10 -069 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 55 0 0 0 0 0 0 0 0 1 0 "/>
<Comments>AR.5002.44 Confidence: 25% PACIFIC flags: F2o cusp not found, One of F2 cusps was derived from the other, F2O model cusp does not fit trace</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" >
2026.03.10 (069) 08:50:00</StartTime>
<SolarTerrestrialData>
<GyroFrequency Val="0.63" Model="IGRF 3.0" Altitude="300"/>
<DipAngle Val="-11.16" 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">
FF202606903100850009039031101000005018000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="29" >
<URSI ID="00" Val="4.050" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="2.975" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="12.049" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="2.750" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="30" Val="4.050" Name="foEs" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="3.550" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="4.350" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="345.591" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="345.591" Name="h`F2" Units="km" QL="/" DL="/" />
<URSI ID="34" Val="95.000" 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="0.600" Name="FF" Units="MHz" QL="/" DL="/" />
<URSI ID="88" Val="3.700" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="365.000" 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="0.804" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="3.550" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="3.550" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<URSI ID="92" Val="325.728" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="256.693" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="3.826" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<Custom Name="fminEs" Val="2.750" Description="Minimum frequency of Es-layer" Units="MHz" />
<URSI ID="94" Val="97.452" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="4.569" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="52.695" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="97.010" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="2.290" Name="B1" QL="/" DL="/" />
<URSI ID="32" Val="3.550" Name="fbEs" Units="MHz" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="2">
<Trace Type="standard" Layer="F2" Polarization="O" Num="11">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
3.55 3.6 3.65 3.7 3.75 3.8 3.85 3.9 3.95 4.0 4.05
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
345.591 350.000 360.000 365.000 375.000 390.000 405.000 430.000 460.000 515.000 603.732
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
0 0 0 0 0 0 0 0 0 0 0
</TraceValueList>
<TraceValueList Name="DopplerShift" Type="float" Units="Hz" NoValue="99.0" Description="Doppler Frequency Shift" >
1.953125 -1.953125 -1.953125 -2.734375 2.734375 0.390625 1.953125 1.953125 -1.171875 -1.171875 2.734375
</TraceValueList>
</Trace>
<Trace Type="standard" Layer="Es" Polarization="O" Num="27">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
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
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
100.000 98.750 97.500 96.250 95.000 95.000 95.000 95.000 95.000 95.000 95.000 95.000 98.333 101.667 105.000 105.000 105.000 105.000 105.000 104.286 103.571 102.857 102.143 101.429 100.714 100.000 100.000
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
75 0 0 0 69 0 66 75 72 75 69 0 0 0 0 66 0 60 57 0 0 0 0 0 0 54 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 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="170">
<AltitudeList Type="float" Units="km" Description="Altitude above station level" >
90.54 95.0 100.0 105.0 110.0 115.0 120.0 125.0 130.0 132.856 135.0 140.0 145.0 150.0 155.0 155.712 160.0 165.0 170.0 175.0 178.568 180.0 185.0 190.0 195.0 200.0 205.0 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 325.728 330.0 335.0 340.0 345.0 350.0 355.0 360.0 365.0 370.0 375.0 380.0 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0 850.0 855.0 860.0 865.0 870.0 875.0 880.0 885.0 890.0 895.0 900.0 905.0 910.0 915.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.534 0.697 0.778 0.804 0.791 0.752 0.682 0.571 0.476 0.476 0.476 0.476 0.476 0.476 0.476 0.538 0.609 0.681 0.753 0.804 0.827 0.916 1.015 1.123 1.236 1.356 1.48 1.61 1.745 1.885 2.03 2.18 2.335 2.492 2.652 2.81 2.967 3.118 3.261 3.395 3.518 3.629 3.727 3.812 3.884 3.942 3.988 4.021 4.042 4.05 4.05 4.047 4.038 4.023 4.001 3.974 3.942 3.906 3.865 3.821 3.773 3.722 3.668 3.612 3.554 3.494 3.433 3.37 3.306 3.242 3.177 3.112 3.046 2.981 2.915 2.85 2.785 2.72 2.656 2.593 2.53 2.468 2.407 2.347 2.288 2.23 2.173 2.116 2.061 2.007 1.954 1.902 1.851 1.802 1.753 1.705 1.659 1.613 1.569 1.526 1.484 1.442 1.402 1.363 1.325 1.288 1.251 1.216 1.182 1.148 1.116 1.084 1.053 1.023 0.994 0.966 0.938 0.911 0.885 0.86 0.835 0.811 0.787 0.765 0.743 0.721 0.7 0.68 0.661 0.641 0.623 0.605 0.587 0.57 0.554 0.538 0.522 0.507 0.492 0.478 0.464 0.45 0.437 0.425 0.412 0.4 0.389 0.377 0.366 0.356 0.345 0.335 0.325 0.316 0.307 0.298 0.289 0.281 0.272 0.265 0.257 0.249 0.242 0.235 0.228 0.221 0.215 0.209 0.203

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="2" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="0.804" PeakHeight="110.0" Num="3" Error="0.0">
-25.434 6.901 -0.927
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="0.804" EndFrequency="4.05" PeakHeight="325.728" Num="5" zHalfNm="256.693" Error="3.478">
-149.9 5.529 -4.126 2.044 -0.707
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="68.568" Depth="0.328"/>
<TopsideChapman PeakHeight="325.728" PeakDensity="203504.97" PeakScaleHeight="52.695" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
