<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-10-24 -297 12:50:00.000"
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="14.0">
<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: 70% 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" >
2026.10.24 (297) 12:50:00</StartTime>
<SolarTerrestrialData>
<GyroFrequency Val="0.63" Model="IGRF 3.0" Altitude="300"/>
<DipAngle Val="-11.40" 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">
FF202629710241250009039031101000005014000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="26" >
<URSI ID="00" Val="10.400" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="2.809" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="29.209" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="9.550" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="9.550" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="10.700" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="415.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="415.000" Name="h`F2" 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="0.250" Name="FF" Units="MHz" QL="/" DL="/" />
<URSI ID="88" Val="9.750" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="420.000" 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="3.262" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="9.550" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="9.550" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<Modeled Name="foF1p" Val="4.301" Units="MHz" ModelName="IRI-90" />
<URSI ID="92" Val="294.216" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="199.340" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="8.074" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="125.036" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="38.924" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="67.860" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="143.740" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="1.620" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="1">
<Trace Type="standard" Layer="F2" Polarization="O" Num="18">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
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
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
415.000 415.000 415.000 420.000 420.000 425.000 430.000 435.000 440.000 440.000 445.000 450.717 457.237 464.741 473.470 483.752 496.040 510.987
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
57 60 57 60 54 54 54 51 48 48 45 48 48 45 51 45 42 42
</TraceValueList>
<TraceValueList Name="DopplerShift" Type="float" Units="Hz" NoValue="99.0" Description="Doppler Frequency Shift" >
0.390625 0.390625 0.390625 0.390625 1.171875 0.390625 0.390625 1.171875 0.390625 0.390625 1.171875 1.171875 0.390625 1.171875 1.171875 1.171875 1.171875 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" >
89.502 90.0 95.0 100.0 105.0 110.0 112.082 114.164 115.0 116.246 120.0 125.0 130.0 135.0 140.0 145.0 150.0 155.0 160.0 165.0 170.0 175.0 180.0 185.0 190.0 195.0 200.0 205.0 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 294.216 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0 360.0 365.0 370.0 375.0 380.0 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0 850.0 855.0 860.0 865.0 870.0 875.0 880.0 885.0 890.0 895.0 900.0 905.0 910.0 915.0 920.0 925.0 930.0 935.0 940.0 945.0 950.0 955.0 960.0 965.0 970.0 975.0 980.0 985.0 990.0 995.0 1000.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.24 2.194 2.823 3.156 3.262 3.14 3.14 3.189 3.262 3.436 3.653 3.867 4.086 4.313 4.551 4.799 5.058 5.325 5.595 5.867 6.136 6.401 6.658 6.908 7.15 7.384 7.612 7.832 8.046 8.254 8.456 8.653 8.845 9.032 9.214 9.391 9.561 9.724 9.878 10.021 10.148 10.255 10.337 10.386 10.4 10.4 10.393 10.375 10.348 10.311 10.265 10.211 10.149 10.08 10.004 9.922 9.834 9.74 9.641 9.538 9.431 9.32 9.206 9.089 8.969 8.847 8.723 8.597 8.47 8.341 8.212 8.082 7.951 7.821 7.69 7.559 7.429 7.298 7.169 7.04 6.912 6.785 6.659 6.534 6.41 6.287 6.166 6.046 5.927 5.81 5.695 5.581 5.469 5.358 5.249 5.141 5.035 4.931 4.829 4.728 4.629 4.532 4.436 4.342 4.25 4.159 4.07 3.983 3.897 3.813 3.731 3.65 3.571 3.493 3.417 3.342 3.269 3.197 3.127 3.058 2.991 2.925 2.86 2.797 2.735 2.674 2.615 2.557 2.5 2.444 2.39 2.336 2.284 2.233 2.183 2.134 2.086 2.039 1.994 1.949 1.905 1.862 1.82 1.779 1.739 1.7 1.662 1.624 1.588 1.552 1.517 1.483 1.449 1.416 1.384 1.353 1.322 1.292 1.263 1.235 1.207 1.179 1.153 1.126 1.101 1.076 1.052 1.028 1.004 0.982 0.959 0.938 0.916 0.895 0.875 0.855 0.836 0.817 0.798 0.78 0.762 0.745 0.728 0.712 0.695 0.68 0.664

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="2" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="3.262" PeakHeight="110.0" Num="3" Error="0.0">
-30.406 13.011 -3.103
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="3.262" EndFrequency="10.4" PeakHeight="294.216" Num="5" zHalfNm="199.34" Error="4.36">
-166.447 -19.592 12.532 -6.661 2.198
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="6.246" Depth="0.122"/>
<TopsideChapman PeakHeight="294.216" PeakDensity="1341935.5" PeakScaleHeight="67.86" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
