<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-03-04 -063 21:00:00.000"
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: 70% PACIFIC flags: Multiple candidates for F2x cusp, Multiple candidates for F2o cusp, Unidentified traces above foF2</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" >
2026.03.04 (063) 21:00:00</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">
FF202606303042100009039031101000005018000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="29" >
<URSI ID="00" Val="11.100" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="2.548" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="28.281" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="2.700" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="30" Val="4.200" Name="foEs" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="4.050" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="11.600" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="285.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="285.000" 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="0.450" Name="FF" Units="MHz" QL="/" DL="/" />
<URSI ID="88" Val="10.700" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="517.100" 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="1.367" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="4.050" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="4.050" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<URSI ID="92" Val="389.153" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="305.819" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="9.451" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<Custom Name="fminEs" Val="2.700" Description="Minimum frequency of Es-layer" Units="MHz" />
<URSI ID="94" Val="119.211" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="40.340" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="60.307" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="133.180" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="1.450" Name="B1" QL="/" DL="/" />
<URSI ID="32" Val="4.050" Name="fbEs" Units="MHz" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="2">
<Trace Type="standard" Layer="F2" Polarization="O" Num="142">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
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 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 8.9 8.95 9.0 9.05 9.1 9.15 9.2 9.25 9.3 9.35 9.4 9.45 9.5 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 10.45 10.5 10.55 10.6 10.65 10.7 10.75 10.8 10.85 10.9 10.95 11.0 11.05 11.1
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
285.000 285.000 285.000 290.000 290.000 290.000 291.000 292.000 293.000 294.000 295.000 300.000 300.000 301.667 303.333 305.000 305.000 306.667 308.333 310.000 311.250 312.500 313.750 315.000 315.000 315.000 317.500 320.000 320.000 320.000 322.500 325.000 325.000 325.000 330.000 330.000 332.500 335.000 335.000 335.000 335.000 340.000 341.667 343.333 345.000 345.000 345.000 346.250 347.500 348.750 350.000 355.000 355.000 355.000 360.000 362.000 364.000 366.000 368.000 370.000 370.000 370.000 375.000 375.000 375.000 375.000 380.000 385.000 385.000 385.000 390.000 390.000 395.000 396.667 398.333 400.000 400.000 400.000 405.000 405.000 405.000 410.000 410.000 415.000 415.000 415.000 420.000 420.000 422.500 425.000 425.000 430.000 430.000 430.000 430.000 435.000 440.000 440.000 442.500 445.000 445.000 445.000 445.000 450.000 450.000 455.000 455.000 460.000 460.000 465.000 465.000 466.667 468.333 470.000 470.000 470.000 475.000 480.000 485.000 485.000 485.000 485.000 490.000 495.000 500.000 505.000 505.000 510.000 510.000 510.000 510.000 512.500 514.604 517.100 520.112 523.816 528.483 534.543 542.730 554.401 572.385 603.698
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
63 57 60 0 0 69 0 60 0 0 0 48 66 0 0 63 66 0 0 63 0 0 0 63 0 69 0 63 51 66 0 66 0 69 66 69 54 63 66 0 69 63 0 0 66 69 69 0 0 54 72 69 72 72 69 0 0 0 0 66 69 72 66 72 72 72 0 63 0 72 66 72 60 0 54 63 69 72 66 72 72 69 72 63 69 72 63 66 0 66 69 57 66 72 75 69 57 63 51 60 66 72 72 69 72 63 66 60 66 57 63 0 0 66 69 66 57 63 57 60 63 60 54 60 51 45 54 48 54 51 54 51 51 0 0 0 48 42 48 48 0 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 -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 -1.171875 -0.390625 -1.171875 -0.390625 -0.390625 -1.171875 -1.171875 -0.390625 -1.171875 -1.171875 -0.390625 -1.171875 -1.171875 -1.171875 -0.390625 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -2.734375 -1.171875 -1.171875 2.734375 0.390625
</TraceValueList>
</Trace>
<Trace Type="standard" Layer="Es" Polarization="O" Num="31">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
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 4.15 4.2
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
115.000 115.000 113.333 111.667 110.000 115.000 115.833 116.667 117.500 118.333 119.167 120.000 120.000 119.167 118.333 117.500 116.667 115.833 115.000 115.000 115.000 113.333 111.667 110.000 110.833 111.667 112.500 113.333 114.167 115.000 115.000
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
63 63 0 0 66 63 0 0 0 0 0 57 54 0 0 0 0 0 0 69 60 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" >
-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 1.953125 -1.953125 -0.390625 -0.390625 -0.390625 0.390625
</TraceValueList>
</Trace>
</TraceList>
<ProfileList Num="1">
<Profile  Algorithm="NH" AlgorithmVersion="4.33" Type="vertical" >
<Tabulated Num="187">
<AltitudeList Type="float" Units="km" Description="Altitude above station level" >
90.002 95.0 100.0 105.0 110.0 115.0 120.0 122.297 125.0 130.0 134.595 135.0 140.0 145.0 146.892 150.0 155.0 160.0 165.0 170.0 175.0 180.0 185.0 190.0 195.0 200.0 205.0 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0 360.0 365.0 370.0 375.0 380.0 385.0 389.153 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0 850.0 855.0 860.0 865.0 870.0 875.0 880.0 885.0 890.0 895.0 900.0 905.0 910.0 915.0 920.0 925.0 930.0 935.0 940.0 945.0 950.0 955.0 960.0 965.0 970.0 975.0 980.0 985.0 990.0 995.0 1000.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.913 1.184 1.323 1.367 1.342 1.267 1.213 1.213 1.213 1.213 1.218 1.281 1.343 1.367 1.469 1.614 1.752 1.89 2.031 2.177 2.33 2.491 2.661 2.84 3.028 3.225 3.43 3.642 3.86 4.084 4.311 4.541 4.773 5.007 5.241 5.475 5.71 5.944 6.178 6.412 6.646 6.879 7.112 7.345 7.578 7.811 8.044 8.277 8.51 8.743 8.976 9.209 9.441 9.67 9.897 10.119 10.333 10.536 10.721 10.881 11.004 11.08 11.1 11.1 11.09 11.066 11.029 10.98 10.919 10.847 10.765 10.674 10.575 10.467 10.353 10.232 10.105 9.973 9.836 9.696 9.552 9.404 9.255 9.103 8.949 8.794 8.638 8.481 8.324 8.167 8.01 7.853 7.698 7.543 7.389 7.236 7.085 6.935 6.786 6.64 6.495 6.352 6.212 6.073 5.936 5.802 5.669 5.539 5.411 5.286 5.163 5.042 4.923 4.806 4.692 4.58 4.471 4.363 4.258 4.155 4.055 3.956 3.86 3.766 3.673 3.583 3.495 3.409 3.325 3.242 3.162 3.084 3.007 2.932 2.859 2.788 2.718 2.65 2.584 2.519 2.456 2.394 2.334 2.275 2.218 2.162 2.107 2.054 2.002 1.952 1.902 1.854 1.807 1.761 1.717 1.673 1.631 1.589 1.549 1.51 1.471 1.434 1.397 1.362 1.327 1.293 1.261 1.228 1.197 1.167 1.137 1.108 1.08 1.052 1.025 0.999 0.974 0.949 0.925 0.901 0.878 0.856 0.834 0.813 0.792 0.772

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="2" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="1.367" PeakHeight="110.0" Num="3" Error="0.0">
-27.785 9.47 -1.683
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="1.367" EndFrequency="11.1" PeakHeight="389.153" Num="5" zHalfNm="305.819" Error="3.025">
-218.202 -41.209 23.57 -10.09 3.67
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="36.892" Depth="0.154"/>
<TopsideChapman PeakHeight="389.153" PeakDensity="1528660.0" PeakScaleHeight="60.307" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
