<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-03-01 -060 21:30:00.000"
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: 95% PACIFIC flags: Multiple candidates for F2x 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" >
2026.03.01 (060) 21:30:00</StartTime>
<SolarTerrestrialData>
<GyroFrequency Val="0.63" Model="IGRF 3.0" Altitude="300"/>
<DipAngle Val="-11.15" 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">
FF202606003012130009039031101000005018000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="25" >
<URSI ID="00" Val="10.850" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="2.509" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="27.222" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="3.100" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="3.100" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="11.350" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="300.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="300.000" 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="0.200" Name="FF" Units="MHz" QL="/" DL="/" />
<URSI ID="88" Val="10.550" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="535.000" 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="0.750" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="3.100" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="3.100" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<URSI ID="92" Val="409.308" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="336.254" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="9.169" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="107.134" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="33.670" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="53.152" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="112.770" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="1.660" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="1">
<Trace Type="standard" Layer="F2" Polarization="O" Num="156">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
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 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
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
300.000 300.000 301.667 303.333 305.000 305.000 305.000 305.000 305.625 306.250 306.875 307.500 308.125 308.750 309.375 310.000 310.000 310.000 310.000 312.500 315.000 320.000 321.667 323.333 325.000 320.000 321.667 323.333 325.000 326.667 328.333 330.000 331.667 333.333 335.000 335.000 330.000 332.500 335.000 337.500 340.000 340.000 340.000 340.000 340.000 345.000 345.000 345.000 346.667 348.333 350.000 352.500 355.000 350.000 350.000 355.000 360.000 360.000 360.000 361.667 363.333 365.000 365.000 367.500 370.000 371.250 372.500 373.750 375.000 375.000 380.000 381.000 382.000 383.000 384.000 385.000 390.000 390.000 395.000 395.000 395.000 395.000 400.000 400.000 400.000 400.000 405.000 405.000 405.000 410.000 410.000 415.000 415.000 415.000 420.000 420.000 420.000 420.000 425.000 425.000 425.000 430.000 435.000 435.000 435.000 440.000 440.000 440.000 445.000 445.000 445.000 450.000 450.000 455.000 455.000 455.000 460.000 460.000 465.000 465.000 470.000 470.000 475.000 475.000 475.000 480.000 480.000 480.000 480.000 490.000 491.667 493.333 495.000 495.000 500.000 502.500 505.000 510.000 510.000 510.000 515.000 515.000 520.000 520.000 520.000 520.000 525.000 530.000 535.000 535.000 540.000 545.000 552.143 561.256 573.288 589.905
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
57 57 0 0 54 0 0 66 0 0 0 0 0 60 0 63 0 51 54 0 0 57 0 0 54 60 0 0 0 0 0 0 0 0 51 54 60 0 0 0 54 0 69 0 69 63 0 69 0 0 66 0 51 0 0 0 60 66 69 0 0 57 60 0 60 51 0 0 60 63 57 0 45 54 0 66 60 63 51 54 60 72 60 69 75 72 69 69 69 69 75 66 72 72 60 69 75 75 72 75 75 75 63 69 72 60 66 72 66 69 72 66 69 63 66 69 63 69 60 66 57 63 54 60 63 60 63 63 63 54 0 0 57 63 60 51 57 51 51 57 54 60 54 57 54 0 54 0 51 51 54 51 48 0 0 0
</TraceValueList>
<TraceValueList Name="DopplerShift" Type="float" Units="Hz" NoValue="99.0" Description="Doppler Frequency Shift" >
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</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" >
90.651 95.0 100.0 105.0 110.0 115.0 120.0 125.0 130.0 134.021 135.0 140.0 145.0 150.0 155.0 158.042 160.0 165.0 170.0 175.0 180.0 182.063 185.0 190.0 195.0 200.0 205.0 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0 360.0 365.0 370.0 375.0 380.0 385.0 390.0 395.0 400.0 405.0 409.308 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0 850.0 855.0 860.0 865.0 870.0 875.0 880.0 885.0 890.0 895.0 900.0 905.0 910.0 915.0 920.0 925.0 930.0 935.0 940.0 945.0 950.0 955.0 960.0 965.0 970.0 975.0 980.0 985.0 990.0 995.0 1000.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.498 0.65 0.726 0.75 0.739 0.703 0.64 0.541 0.413 0.413 0.413 0.413 0.413 0.413 0.413 0.44 0.511 0.581 0.651 0.721 0.75 0.84 0.956 1.063 1.171 1.284 1.405 1.537 1.682 1.841 2.018 2.214 2.429 2.662 2.91 3.172 3.444 3.721 4.002 4.284 4.567 4.848 5.129 5.408 5.685 5.962 6.237 6.512 6.786 7.059 7.331 7.604 7.876 8.148 8.419 8.689 8.957 9.223 9.484 9.739 9.984 10.215 10.424 10.603 10.741 10.826 10.85 10.85 10.838 10.809 10.763 10.703 10.628 10.54 10.441 10.33 10.21 10.081 9.944 9.8 9.65 9.495 9.336 9.172 9.005 8.836 8.665 8.492 8.318 8.144 7.97 7.796 7.623 7.45 7.279 7.109 6.941 6.775 6.61 6.448 6.289 6.131 5.977 5.825 5.675 5.528 5.385 5.244 5.105 4.97 4.838 4.708 4.582 4.458 4.337 4.219 4.103 3.991 3.881 3.774 3.67 3.568 3.469 3.372 3.278 3.186 3.096 3.009 2.925 2.842 2.762 2.684 2.608 2.534 2.462 2.392 2.324 2.257 2.193 2.13 2.07 2.01 1.953 1.897 1.843 1.79 1.738 1.689 1.64 1.593 1.547 1.503 1.459 1.417 1.377 1.337 1.298 1.261 1.225 1.189 1.155 1.122 1.089 1.058 1.027 0.998 0.969 0.941 0.914 0.887 0.862 0.837 0.813 0.789 0.766 0.744 0.723 0.702 0.681 0.662 0.642 0.624 0.606 0.588 0.571 0.555

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="2" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="0.75" PeakHeight="110.0" Num="3" Error="0.0">
-25.057 6.553 -0.845
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="0.75" EndFrequency="10.85" PeakHeight="409.308" Num="5" zHalfNm="336.254" Error="4.591">
-212.956 -27.487 19.308 -11.471 5.361
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="72.063" Depth="0.337"/>
<TopsideChapman PeakHeight="409.308" PeakDensity="1460576.9" PeakScaleHeight="53.152" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
