<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-03-17 -076 15:20:00.000"
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 22 0 0 0 0 0 0 0 0 1 0 "/>
<Comments>AR.5002.44 Confidence: 85% PACIFIC flags: Multiple candidates for F2x cusp, 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" >
2026.03.17 (076) 15:20:00</StartTime>
<SolarTerrestrialData>
<GyroFrequency Val="0.63" Model="IGRF 3.0" Altitude="300"/>
<DipAngle Val="-11.17" 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">
FF202607603171520009039031101000005018000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="26" >
<URSI ID="00" Val="9.400" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="2.370" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="22.274" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="5.100" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="5.100" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="9.750" 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="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="7.700" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="445.000" 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="3.406" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="5.100" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="5.100" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<Modeled Name="foF1p" Val="4.367" Units="MHz" ModelName="IRI-90" />
<URSI ID="92" Val="388.837" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="235.195" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="8.371" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="197.691" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="50.984" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="109.158" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="236.000" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="1.550" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="1">
<Trace Type="standard" Layer="F2" Polarization="O" Num="87">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
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
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
285.000 290.000 290.000 293.750 297.500 301.250 305.000 310.000 312.500 315.000 320.000 320.000 322.500 325.000 330.000 330.000 330.000 335.000 340.000 340.000 345.000 350.000 350.000 350.000 355.000 355.000 360.000 363.333 366.667 370.000 370.000 375.000 375.000 380.000 385.000 385.000 390.000 390.000 395.000 395.000 395.000 405.000 405.000 410.000 415.000 420.000 425.000 425.000 430.000 435.000 440.000 445.000 445.000 455.000 465.000 470.000 475.000 475.000 480.000 485.000 495.000 505.000 510.000 515.000 520.000 520.000 525.000 530.000 535.000 540.000 545.000 550.000 555.000 565.000 570.000 578.258 587.201 596.919 607.517 619.121 631.880 645.977 661.632 679.121 698.784 721.055 746.488
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
45 48 51 0 0 0 51 48 0 48 48 51 0 54 54 54 54 0 51 54 54 0 0 57 54 57 57 0 0 51 57 54 60 0 48 60 54 63 57 60 57 54 57 57 57 54 54 57 60 60 60 60 60 60 48 51 54 57 57 57 57 45 51 54 54 57 57 57 60 60 60 60 63 60 60 60 63 60 60 57 57 54 54 54 51 48 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 -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 -0.390625 -0.390625 -0.390625 -0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 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" >
89.481 90.0 95.0 100.0 105.0 110.0 111.485 112.971 114.456 115.0 120.0 125.0 130.0 135.0 140.0 145.0 150.0 155.0 160.0 165.0 170.0 175.0 180.0 185.0 190.0 195.0 200.0 205.0 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0 360.0 365.0 370.0 375.0 380.0 385.0 388.837 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0 850.0 855.0 860.0 865.0 870.0 875.0 880.0 885.0 890.0 895.0 900.0 905.0 910.0 915.0 920.0 925.0 930.0 935.0 940.0 945.0 950.0 955.0 960.0 965.0 970.0 975.0 980.0 985.0 990.0 995.0 1000.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.241 2.291 2.947 3.295 3.406 3.283 3.283 3.406 3.421 3.551 3.674 3.794 3.914 4.034 4.156 4.28 4.408 4.538 4.672 4.81 4.95 5.093 5.237 5.383 5.529 5.675 5.819 5.962 6.103 6.242 6.378 6.511 6.642 6.77 6.895 7.017 7.137 7.255 7.37 7.483 7.594 7.703 7.81 7.915 8.019 8.121 8.221 8.32 8.417 8.512 8.606 8.697 8.786 8.873 8.956 9.036 9.112 9.182 9.245 9.3 9.344 9.377 9.396 9.4 9.4 9.397 9.391 9.381 9.367 9.35 9.33 9.306 9.28 9.251 9.218 9.184 9.146 9.106 9.064 9.019 8.973 8.924 8.873 8.821 8.766 8.71 8.653 8.594 8.533 8.472 8.409 8.345 8.279 8.213 8.146 8.078 8.009 7.94 7.87 7.799 7.728 7.656 7.584 7.512 7.439 7.366 7.293 7.22 7.147 7.073 6.999 6.926 6.853 6.779 6.706 6.633 6.56 6.487 6.415 6.342 6.27 6.199 6.127 6.056 5.986 5.916 5.846 5.776 5.707 5.639 5.571 5.503 5.436 5.37 5.304 5.238 5.173 5.109 5.045 4.982 4.919 4.857 4.795 4.734 4.674 4.614 4.555 4.496 4.438 4.38 4.323 4.267 4.211 4.156 4.101 4.047 3.994 3.941 3.889 3.837 3.786 3.736 3.686 3.637 3.588 3.54 3.492 3.445 3.399 3.353 3.308 3.263 3.218 3.175 3.132 3.089 3.047 3.005 2.964 2.924 2.883 2.844 2.805 2.766 2.728 2.691 2.654

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="2" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="3.406" PeakHeight="110.0" Num="3" Error="0.0">
-30.511 13.167 -3.175
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="3.406" EndFrequency="9.4" PeakHeight="388.837" Num="5" zHalfNm="235.195" Error="5.191">
-250.362 -37.79 20.965 -10.676 3.482
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="4.456" Depth="0.123"/>
<TopsideChapman PeakHeight="388.837" PeakDensity="1096277.9" PeakScaleHeight="109.158" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
