<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-02-06 -037 14:20:00.000"
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 11 0 0 0 0 0 0 0 0 1 0 "/>
<Comments>AR.5002.44 Confidence: 90% PACIFIC flags: 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" >
2026.02.06 (037) 14:20:00</StartTime>
<SolarTerrestrialData>
<GyroFrequency Val="0.63" Model="IGRF 3.0" Altitude="300"/>
<DipAngle Val="-11.13" 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">
FF202603702061420009039031101000005018000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="26" >
<URSI ID="00" Val="8.850" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="2.437" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="21.565" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="5.400" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="5.400" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="9.150" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="335.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="335.000" 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="0.100" Name="FF" Units="MHz" QL="/" DL="/" />
<URSI ID="88" Val="7.250" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="427.000" 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="3.353" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="5.400" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="5.400" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<Modeled Name="foF1p" Val="4.343" Units="MHz" ModelName="IRI-90" />
<URSI ID="92" Val="378.236" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="232.779" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="7.336" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="187.085" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="43.669" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="105.340" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="226.810" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="1.560" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="1">
<Trace Type="standard" Layer="F2" Polarization="O" Num="70">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
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 7.25 7.3 7.35 7.4 7.45 7.5 7.55 7.6 7.65 7.7 7.75 7.8 7.85 7.9 7.95 8.0 8.05 8.1 8.15 8.2 8.25 8.3 8.35 8.4 8.45 8.5 8.55 8.6 8.65 8.7 8.75 8.8 8.85
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
335.000 340.000 345.000 345.000 350.000 355.000 355.000 355.000 360.000 360.000 365.000 365.000 370.000 370.000 370.000 375.000 376.667 378.333 380.000 380.000 385.000 385.000 385.000 390.000 390.000 390.000 395.000 400.000 400.000 403.000 406.000 409.000 412.000 415.000 415.000 419.000 423.000 427.000 431.000 435.000 440.000 445.000 450.000 455.000 460.000 465.000 470.000 475.000 480.000 485.000 493.750 502.500 511.250 520.000 525.000 530.000 540.000 550.000 560.000 570.000 578.703 588.272 598.845 610.586 623.703 638.450 655.153 674.228 696.220 721.851
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
45 48 51 54 0 54 57 48 57 57 51 51 48 51 54 51 0 0 54 57 51 57 57 54 57 54 0 54 54 0 0 51 0 51 45 0 48 0 0 48 0 0 0 51 51 51 48 0 0 51 0 0 51 51 60 60 57 54 54 54 54 51 51 51 54 0 51 45 45 45
</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 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 -2.734375 0.390625 0.390625 0.390625 -0.390625 0.390625 0.390625 -0.390625 1.953125 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 -1.953125 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" >
89.489 90.0 95.0 100.0 105.0 110.0 111.702 113.403 115.0 115.105 120.0 125.0 130.0 135.0 140.0 145.0 150.0 155.0 160.0 165.0 170.0 175.0 180.0 185.0 190.0 195.0 200.0 205.0 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0 360.0 365.0 370.0 375.0 378.236 380.0 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0 850.0 855.0 860.0 865.0 870.0 875.0 880.0 885.0 890.0 895.0 900.0 905.0 910.0 915.0 920.0 925.0 930.0 935.0 940.0 945.0 950.0 955.0 960.0 965.0 970.0 975.0 980.0 985.0 990.0 995.0 1000.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.24 2.256 2.902 3.244 3.353 3.23 3.23 3.345 3.353 3.497 3.626 3.747 3.865 3.979 4.094 4.208 4.323 4.439 4.557 4.676 4.797 4.919 5.044 5.169 5.295 5.423 5.551 5.679 5.807 5.935 6.062 6.188 6.313 6.437 6.56 6.681 6.801 6.918 7.035 7.149 7.262 7.373 7.482 7.589 7.694 7.797 7.898 7.997 8.093 8.186 8.276 8.363 8.445 8.523 8.595 8.66 8.718 8.767 8.805 8.832 8.847 8.85 8.85 8.846 8.839 8.829 8.815 8.797 8.776 8.753 8.726 8.696 8.663 8.628 8.59 8.55 8.507 8.462 8.415 8.366 8.315 8.263 8.208 8.152 8.095 8.036 7.976 7.914 7.852 7.788 7.723 7.658 7.591 7.524 7.456 7.388 7.319 7.249 7.179 7.108 7.038 6.967 6.895 6.824 6.752 6.681 6.609 6.537 6.465 6.394 6.322 6.251 6.18 6.109 6.038 5.968 5.897 5.827 5.758 5.689 5.62 5.552 5.484 5.416 5.349 5.282 5.216 5.151 5.085 5.021 4.957 4.893 4.83 4.768 4.706 4.644 4.584 4.523 4.464 4.405 4.346 4.288 4.231 4.174 4.118 4.063 4.008 3.954 3.9 3.847 3.794 3.743 3.691 3.641 3.59 3.541 3.492 3.444 3.396 3.349 3.302 3.256 3.21 3.166 3.121 3.077 3.034 2.991 2.949 2.908 2.867 2.826 2.786 2.747 2.708 2.669 2.631 2.594 2.557 2.52 2.484 2.449 2.414 2.379 2.345 2.311 2.278

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="2" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="3.353" PeakHeight="110.0" Num="3" Error="0.0">
-30.474 13.112 -3.149
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="3.353" EndFrequency="8.85" PeakHeight="378.236" Num="5" zHalfNm="232.779" Error="6.728">
-238.968 -35.837 14.191 -4.974 2.457
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="5.105" Depth="0.123"/>
<TopsideChapman PeakHeight="378.236" PeakDensity="971743.2" PeakScaleHeight="105.34" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
