<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-03-10 -069 12:30:00.000"
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: Multiple candidates for F2x cusp, Multiple candidates for F2o cusp</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) 12:30:00</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">
FF202606903101230009039031101000005018000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="26" >
<URSI ID="00" Val="11.550" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="2.743" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="31.676" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="4.550" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="4.550" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="12.000" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="230.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="230.000" 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="10.950" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="446.249" 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="3.135" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="4.550" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="4.550" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<Modeled Name="foF1p" Val="4.240" Units="MHz" ModelName="IRI-90" />
<URSI ID="92" Val="338.770" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="254.185" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="7.210" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="112.468" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="45.769" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="62.741" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="144.480" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="1.270" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="1">
<Trace Type="standard" Layer="F2" Polarization="O" Num="141">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
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 11.15 11.2 11.25 11.3 11.35 11.4 11.45 11.5 11.55
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
230.000 230.000 235.000 240.000 245.000 250.000 253.750 257.500 261.250 265.000 265.000 270.000 275.000 278.750 282.500 286.250 290.000 295.000 295.000 295.000 295.000 295.000 300.000 300.000 300.000 300.833 301.667 302.500 303.333 304.167 305.000 305.000 305.000 305.000 310.000 310.000 310.000 310.000 310.833 311.667 312.500 313.333 314.167 315.000 316.429 317.857 319.286 320.714 322.143 323.571 325.000 320.000 325.000 325.000 327.500 330.000 330.000 331.667 333.333 335.000 340.000 340.000 340.000 340.000 345.000 345.000 345.000 350.000 350.000 355.000 355.000 355.000 360.000 360.000 365.000 365.000 365.000 370.000 370.000 370.000 375.000 375.000 377.500 380.000 380.000 380.000 382.500 385.000 385.000 387.500 390.000 390.000 395.000 395.000 395.000 395.000 400.000 400.000 400.000 401.667 403.333 405.000 410.000 407.500 405.000 410.000 410.000 410.000 412.000 414.000 416.000 418.000 420.000 420.000 420.000 422.500 425.000 425.000 425.000 425.000 430.000 435.000 435.000 435.000 440.000 440.000 440.000 442.968 446.249 449.897 453.975 458.564 463.769 469.720 476.591 484.614 494.104 505.504 519.456 536.923 559.428
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
54 51 0 0 48 51 0 0 0 54 54 51 54 0 0 0 48 48 60 0 57 51 57 0 57 0 0 57 0 0 54 57 60 63 63 0 0 57 0 0 0 51 0 63 0 0 48 0 60 0 45 66 57 63 0 0 57 0 0 60 54 57 63 69 63 66 63 63 66 60 63 69 60 63 51 60 63 57 60 66 57 54 51 60 0 66 0 66 66 0 63 66 63 66 66 66 63 66 63 0 0 66 51 0 63 63 60 57 0 0 0 0 51 54 54 0 54 57 57 57 54 48 51 54 51 48 45 51 51 54 48 48 0 45 0 45 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 -2.734375 -0.390625 -0.390625 -0.390625 -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 -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 -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 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 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 1.171875 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 -0.390625 0.390625 0.390625 1.953125 0.390625 -0.390625 0.390625 2.734375 1.171875 1.171875 1.171875 2.734375
</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" >
89.523 90.0 95.0 100.0 105.0 110.0 112.623 115.0 115.247 117.87 120.0 125.0 130.0 135.0 140.0 145.0 150.0 155.0 160.0 165.0 170.0 175.0 180.0 185.0 190.0 195.0 200.0 205.0 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 338.77 340.0 345.0 350.0 355.0 360.0 365.0 370.0 375.0 380.0 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0 850.0 855.0 860.0 865.0 870.0 875.0 880.0 885.0 890.0 895.0 900.0 905.0 910.0 915.0 920.0 925.0 930.0 935.0 940.0 945.0 950.0 955.0 960.0 965.0 970.0 975.0 980.0 985.0 990.0 995.0 1000.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.238 2.108 2.713 3.033 3.135 3.013 3.013 3.013 3.135 3.205 3.365 3.52 3.673 3.826 3.98 4.135 4.292 4.451 4.614 4.779 4.948 5.12 5.297 5.477 5.662 5.851 6.044 6.241 6.443 6.649 6.859 7.074 7.292 7.515 7.742 7.972 8.205 8.442 8.682 8.924 9.167 9.412 9.657 9.901 10.143 10.38 10.609 10.827 11.029 11.209 11.359 11.47 11.535 11.55 11.55 11.539 11.515 11.479 11.43 11.37 11.3 11.22 11.131 11.034 10.928 10.816 10.698 10.573 10.443 10.309 10.17 10.028 9.883 9.734 9.584 9.431 9.277 9.122 8.966 8.809 8.652 8.495 8.338 8.181 8.025 7.87 7.716 7.563 7.411 7.261 7.112 6.965 6.82 6.676 6.534 6.394 6.256 6.121 5.987 5.855 5.726 5.599 5.474 5.351 5.23 5.112 4.995 4.881 4.769 4.66 4.552 4.447 4.343 4.242 4.143 4.046 3.951 3.858 3.767 3.678 3.591 3.506 3.423 3.341 3.261 3.184 3.107 3.033 2.96 2.889 2.82 2.752 2.686 2.621 2.558 2.496 2.435 2.376 2.319 2.263 2.208 2.154 2.102 2.051 2.001 1.952 1.905 1.858 1.813 1.769 1.726 1.684 1.643 1.602 1.563 1.525 1.488 1.451 1.416 1.381 1.347 1.314 1.282 1.251 1.22 1.19 1.161 1.133 1.105 1.078 1.051 1.026 1.001 0.976 0.952 0.929 0.906 0.884 0.862 0.841 0.82 0.8 0.78 0.761 0.743 0.724 0.706

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="2" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="3.135" PeakHeight="110.0" Num="3" Error="0.0">
-30.306 12.865 -3.036
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="3.135" EndFrequency="11.55" PeakHeight="338.77" Num="5" zHalfNm="254.185" Error="3.075">
-180.736 -50.113 10.111 -0.881 0.719
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="7.87" Depth="0.122"/>
<TopsideChapman PeakHeight="338.77" PeakDensity="1655117.9" PeakScaleHeight="62.741" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
