<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-10-21 -294 17:50:00.000"
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="12.0">
<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 44 0 0 0 0 0 0 0 0 1 0 "/>
<Comments>AR.5002.44 Confidence: 45% PACIFIC flags: F2x cusp not found, 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" >
2026.10.21 (294) 17:50:00</StartTime>
<SolarTerrestrialData>
<GyroFrequency Val="0.63" Model="IGRF 3.0" Altitude="300"/>
<DipAngle Val="-11.39" 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">
FF202629410211750009039031101000005012000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="30" >
<URSI ID="00" Val="6.550" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="3.181" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="20.837" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="4.450" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="30" Val="6.150" Name="foEs" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="5.000" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="6.800" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="310.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="310.000" 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="0.200" Name="FF" Units="MHz" QL="/" DL="/" />
<URSI ID="88" Val="6.450" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="370.000" 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="2.998" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="5.000" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="5.000" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<Modeled Name="foF1p" Val="4.173" Units="MHz" ModelName="IRI-90" />
<URSI ID="92" Val="248.364" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="173.536" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="10.097" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<Custom Name="fminEs" Val="4.450" Description="Minimum frequency of Es-layer" Units="MHz" />
<URSI ID="94" Val="77.689" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="11.572" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="48.695" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="135.920" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="1.000" Name="B1" QL="/" DL="/" />
<URSI ID="32" Val="5.000" Name="fbEs" Units="MHz" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="2">
<Trace Type="standard" Layer="F2" Polarization="O" Num="32">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
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
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
310.000 310.000 310.000 315.000 320.000 320.000 320.000 325.000 325.000 325.000 327.143 329.286 331.429 333.571 335.714 337.857 340.000 345.000 350.000 350.000 350.000 352.500 355.000 360.000 360.000 360.000 365.000 370.000 370.000 370.000 374.592 379.687
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
54 60 54 63 63 66 57 0 63 60 0 57 0 0 0 0 0 0 0 0 0 0 0 0 0 0 48 0 0 63 57 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 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 -0.390625 -0.390625 -0.390625
</TraceValueList>
</Trace>
<Trace Type="standard" Layer="Es" Polarization="O" Num="35">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
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
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
120.000 115.000 115.000 115.000 115.000 115.000 115.000 115.000 110.000 105.000 105.000 105.000 105.000 105.000 105.000 105.000 105.000 105.000 105.000 105.000 105.000 105.000 100.000 100.000 105.000 105.000 105.000 105.000 105.000 105.000 105.000 105.000 105.000 105.000 105.000
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
54 57 0 0 57 0 0 0 57 69 66 0 63 0 60 48 0 0 57 57 0 54 45 48 0 51 51 60 51 54 0 57 48 0 48
</TraceValueList>
<TraceValueList Name="DopplerShift" Type="float" Units="Hz" NoValue="99.0" Description="Doppler Frequency Shift" >
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
</TraceValueList>
</Trace>
</TraceList>
<ProfileList Num="1">
<Profile  Algorithm="NH" AlgorithmVersion="4.33" Type="vertical" >
<Tabulated Num="161">
<AltitudeList Type="float" Units="km" Description="Altitude above station level" >
89.546 90.0 95.0 100.0 105.0 110.0 113.226 115.0 116.452 119.678 120.0 125.0 130.0 135.0 140.0 145.0 150.0 155.0 160.0 165.0 170.0 175.0 180.0 185.0 190.0 195.0 200.0 205.0 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 248.364 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0 360.0 365.0 370.0 375.0 380.0 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0 850.0 855.0 860.0 865.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.237 2.015 2.595 2.901 2.998 2.876 2.876 2.876 2.998 3.01 3.198 3.385 3.561 3.725 3.878 4.022 4.16 4.292 4.42 4.545 4.667 4.788 4.908 5.028 5.148 5.268 5.391 5.515 5.642 5.772 5.908 6.049 6.198 6.353 6.502 6.55 6.549 6.538 6.515 6.481 6.436 6.381 6.317 6.246 6.167 6.082 5.992 5.896 5.796 5.693 5.587 5.478 5.367 5.254 5.141 5.026 4.911 4.797 4.682 4.568 4.455 4.342 4.231 4.121 4.012 3.905 3.8 3.696 3.594 3.494 3.397 3.301 3.207 3.115 3.025 2.937 2.852 2.768 2.686 2.607 2.53 2.454 2.381 2.309 2.24 2.172 2.106 2.042 1.98 1.919 1.861 1.804 1.748 1.694 1.642 1.592 1.542 1.495 1.448 1.403 1.36 1.317 1.276 1.237 1.198 1.161 1.125 1.089 1.055 1.022 0.99 0.959 0.929 0.9 0.872 0.844 0.818 0.792 0.767 0.743 0.72 0.697 0.675 0.654 0.634 0.614 0.594 0.576 0.557 0.54 0.523 0.506 0.49 0.475 0.46 0.446 0.431 0.418 0.405 0.392 0.38 0.368 0.356 0.345 0.334 0.323 0.313 0.303 0.294 0.284 0.275 0.267 0.258 0.25 0.242 0.235 0.227 0.22 0.213 0.206

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="2" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="2.998" PeakHeight="110.0" Num="3" Error="0.0">
-30.193 12.7 -2.961
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="2.998" EndFrequency="6.55" PeakHeight="248.364" Num="5" zHalfNm="173.536" Error="1.786">
-98.454 -45.875 18.433 -2.423 -0.367
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="9.678" Depth="0.122"/>
<TopsideChapman PeakHeight="248.364" PeakDensity="532289.06" PeakScaleHeight="48.695" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
