<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-02-26 -057 17:30:00.000"
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 33 0 0 0 0 0 0 0 0 1 0 "/>
<Comments>AR.5002.44 Confidence: 65% PACIFIC flags: Multiple candidates for F2o cusp, One of F2 cusps was derived from the other, 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" >
2026.02.26 (057) 17:30:00</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">
FF202605702261730009039031101000005018000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="25" >
<URSI ID="00" Val="10.250" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="2.469" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="25.308" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="5.250" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="5.250" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="10.550" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="290.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="290.000" 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="0.500" Name="FF" Units="MHz" QL="/" DL="/" />
<URSI ID="88" Val="9.750" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="530.000" Name="h`(fMUF)" Units="km" QL="/" DL="/" />
<Modeled Name="foEp" Val="3.188" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="5.250" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="5.250" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<Modeled Name="foF1p" Val="4.266" Units="MHz" ModelName="IRI-90" />
<URSI ID="92" Val="362.963" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="251.273" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="8.309" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="139.776" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="44.304" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="77.193" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="190.150" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="1.150" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="1">
<Trace Type="standard" Layer="F2" Polarization="O" Num="101">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
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
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
290.000 295.000 295.000 300.000 301.000 302.000 303.000 304.000 305.000 305.000 310.000 310.000 310.000 320.000 320.000 320.000 321.667 323.333 325.000 325.000 330.000 335.000 340.000 340.000 342.500 345.000 350.000 351.250 352.500 353.750 355.000 360.000 362.500 365.000 370.000 370.000 375.000 375.000 380.000 380.000 385.000 385.000 390.000 392.500 395.000 395.000 400.000 400.000 405.000 407.500 410.000 415.000 415.000 420.000 425.000 425.000 430.000 430.000 435.000 440.000 440.000 445.000 445.000 450.000 455.000 455.000 460.000 465.000 470.000 470.000 475.000 480.000 480.000 485.000 485.000 490.000 490.000 495.000 500.000 505.000 505.000 505.000 510.000 515.000 515.000 520.000 520.000 525.000 530.000 530.000 530.000 535.000 540.000 543.768 548.026 552.875 558.447 564.917 572.521 581.587 592.581
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
48 51 54 51 0 0 54 0 57 54 57 57 51 45 54 57 0 0 57 57 0 54 48 54 0 57 48 0 0 0 60 57 0 60 54 60 54 60 54 60 54 57 54 0 54 63 57 66 60 54 63 57 63 60 54 66 57 66 63 57 69 63 69 66 60 66 66 63 60 66 63 60 63 60 66 63 66 66 60 51 60 66 60 48 57 51 57 57 54 60 57 57 57 54 54 54 54 51 45 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 -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
</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" >
89.515 90.0 95.0 100.0 105.0 110.0 112.393 114.787 115.0 117.18 120.0 125.0 130.0 135.0 140.0 145.0 150.0 155.0 160.0 165.0 170.0 175.0 180.0 185.0 190.0 195.0 200.0 205.0 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0 360.0 362.963 365.0 370.0 375.0 380.0 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0 850.0 855.0 860.0 865.0 870.0 875.0 880.0 885.0 890.0 895.0 900.0 905.0 910.0 915.0 920.0 925.0 930.0 935.0 940.0 945.0 950.0 955.0 960.0 965.0 970.0 975.0 980.0 985.0 990.0 995.0 1000.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.239 2.144 2.759 3.084 3.188 3.066 3.066 3.077 3.188 3.289 3.449 3.598 3.742 3.884 4.025 4.168 4.312 4.457 4.605 4.756 4.908 5.061 5.217 5.373 5.529 5.686 5.843 5.999 6.155 6.309 6.463 6.615 6.766 6.915 7.064 7.211 7.356 7.501 7.645 7.788 7.93 8.072 8.213 8.354 8.495 8.636 8.777 8.918 9.06 9.203 9.346 9.49 9.634 9.777 9.917 10.05 10.164 10.237 10.25 10.249 10.242 10.226 10.204 10.173 10.136 10.093 10.043 9.988 9.927 9.86 9.789 9.714 9.634 9.551 9.463 9.373 9.279 9.183 9.084 8.983 8.88 8.775 8.668 8.56 8.451 8.34 8.229 8.117 8.004 7.891 7.778 7.665 7.552 7.438 7.325 7.213 7.1 6.988 6.877 6.766 6.657 6.547 6.439 6.332 6.225 6.12 6.015 5.912 5.81 5.709 5.609 5.51 5.412 5.316 5.221 5.127 5.035 4.943 4.853 4.765 4.677 4.591 4.506 4.423 4.34 4.259 4.18 4.101 4.024 3.948 3.873 3.8 3.728 3.657 3.587 3.518 3.451 3.385 3.32 3.256 3.193 3.131 3.071 3.011 2.953 2.895 2.839 2.784 2.73 2.676 2.624 2.573 2.522 2.473 2.424 2.377 2.33 2.284 2.239 2.195 2.152 2.11 2.068 2.027 1.987 1.948 1.909 1.872 1.834 1.798 1.762 1.728 1.693 1.66 1.627 1.594 1.563 1.532 1.501 1.471 1.442 1.413 1.385 1.358 1.331 1.304 1.278

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="2" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="3.188" PeakHeight="110.0" Num="3" Error="0.0">
-30.348 12.927 -3.064
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="3.188" EndFrequency="10.25" PeakHeight="362.963" Num="5" zHalfNm="251.273" Error="2.993">
-201.446 -67.887 30.933 -10.654 3.271
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="7.18" Depth="0.122"/>
<TopsideChapman PeakHeight="362.963" PeakDensity="1303505.0" PeakScaleHeight="77.193" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
