<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-03-27 -086 15:10:00.000"
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 1 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" >
2026.03.27 (086) 15:10:00</StartTime>
<SolarTerrestrialData>
<GyroFrequency Val="0.63" Model="IGRF 3.0" Altitude="300"/>
<DipAngle Val="-11.18" 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">
FF202608603271510009039031101000005018000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="30" >
<URSI ID="00" Val="11.225" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="10" Val="5.523" Name="foF1" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="2.716" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="30.414" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="5.000" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="5.000" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="11.800" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="255.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="317.083" 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="0.300" Name="FF" Units="MHz" QL="/" DL="/" />
<URSI ID="88" Val="10.800" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="466.640" Name="h`(fMUF)" Units="km" QL="/" DL="/" />
<Custom Name="dlt foF2" Val="0.025" Description="Adjustment to the scaled foF2 during profile inversion" Units="MHz" />
<Modeled Name="foEp" Val="3.403" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="5.000" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="5.550" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<Modeled Name="foF1p" Val="4.366" Units="MHz" ModelName="IRI-90" />
<URSI ID="92" Val="333.998" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="91" Val="189.190" Name="hmF1" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="252.931" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="8.289" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="95.611" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="95" Val="67.384" Name="yF1" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="42.267" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="60.823" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="139.740" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="1.240" Name="B1" QL="/" DL="/" />
<URSI ID="D2" Val="0.470" Name="D1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="2">
<Trace Type="standard" Layer="F2" Polarization="O" Num="114">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
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
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
317.083 319.167 321.250 323.333 325.417 327.500 329.583 331.667 333.750 335.833 337.917 340.000 340.000 340.000 340.000 340.000 340.000 340.000 340.000 340.000 340.000 340.000 340.000 340.000 340.000 340.000 345.000 345.000 345.000 345.000 345.000 345.000 345.000 345.000 350.000 350.000 350.000 350.000 350.000 350.000 350.000 350.000 355.000 355.000 355.000 355.000 355.000 360.000 360.000 360.000 360.000 365.000 365.000 365.000 367.500 370.000 370.000 371.429 372.857 374.286 375.714 377.143 378.571 380.000 380.000 382.500 385.000 385.000 390.000 390.000 390.000 395.000 395.000 395.000 400.000 400.000 400.000 405.000 405.000 410.000 410.000 410.000 410.000 412.500 415.000 417.500 420.000 422.500 425.000 425.000 425.000 428.333 431.667 435.000 435.000 435.000 435.000 440.000 445.000 445.000 450.000 452.500 455.000 460.000 463.100 466.640 470.724 475.486 481.111 487.856 496.092 506.376 519.580 537.154
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
0 0 0 0 0 0 0 0 0 0 0 45 0 51 0 48 51 0 0 0 0 48 48 48 48 48 51 54 54 51 54 51 48 51 54 57 60 60 60 57 54 51 60 0 0 54 54 60 66 66 63 57 60 57 0 51 54 0 45 0 0 48 0 54 54 0 45 51 51 54 60 57 63 63 60 63 63 60 63 54 57 0 60 0 57 0 54 0 51 0 60 0 0 48 54 57 54 54 48 51 51 0 48 45 0 51 48 45 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 -1.953125 -1.953125 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 -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 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 1.171875 0.390625 0.390625 -2.734375 -0.390625 0.390625 2.734375 0.390625 0.390625 0.390625 -0.390625 -2.734375 1.953125 -1.171875 -2.734375 1.953125
</TraceValueList>
</Trace>
<Trace Type="standard" Layer="F1" Polarization="O" Num="11">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
5.0 5.05 5.1 5.15 5.2 5.25 5.3 5.35 5.4 5.45 5.5
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
255.000 265.000 270.000 277.500 285.000 290.000 295.000 300.000 305.000 310.000 315.000
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
51 51 51 0 48 48 48 45 0 51 48
</TraceValueList>
<TraceValueList Name="DopplerShift" Type="float" Units="Hz" NoValue="99.0" Description="Doppler Frequency Shift" >
0.390625 0.390625 0.390625 1.171875 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="189">
<AltitudeList Type="float" Units="km" Description="Altitude above station level" >
89.481 90.0 95.0 100.0 105.0 110.0 111.497 112.995 114.492 115.0 120.0 125.0 130.0 135.0 140.0 145.0 150.0 155.0 160.0 165.0 170.0 175.0 180.0 185.0 189.19 190.0 195.0 200.0 205.0 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 333.998 335.0 340.0 345.0 350.0 355.0 360.0 365.0 370.0 375.0 380.0 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0 850.0 855.0 860.0 865.0 870.0 875.0 880.0 885.0 890.0 895.0 900.0 905.0 910.0 915.0 920.0 925.0 930.0 935.0 940.0 945.0 950.0 955.0 960.0 965.0 970.0 975.0 980.0 985.0 990.0 995.0 1000.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.241 2.289 2.945 3.292 3.403 3.28 3.28 3.403 3.425 3.63 3.831 4.027 4.212 4.38 4.534 4.673 4.802 4.923 5.038 5.149 5.259 5.367 5.472 5.523 5.543 5.672 5.808 5.952 6.105 6.269 6.445 6.634 6.837 7.055 7.287 7.532 7.786 8.045 8.305 8.564 8.817 9.064 9.304 9.536 9.761 9.979 10.191 10.396 10.594 10.781 10.953 11.099 11.198 11.225 11.225 11.215 11.191 11.153 11.104 11.043 10.971 10.889 10.798 10.699 10.592 10.477 10.356 10.229 10.098 9.961 9.82 9.676 9.529 9.379 9.227 9.073 8.918 8.761 8.604 8.447 8.289 8.132 7.975 7.818 7.663 7.508 7.355 7.203 7.052 6.903 6.755 6.61 6.466 6.324 6.184 6.047 5.911 5.778 5.647 5.518 5.391 5.266 5.144 5.024 4.907 4.791 4.678 4.567 4.459 4.353 4.248 4.146 4.047 3.949 3.853 3.76 3.669 3.579 3.492 3.406 3.323 3.241 3.162 3.084 3.008 2.933 2.861 2.79 2.721 2.653 2.587 2.523 2.46 2.399 2.339 2.281 2.224 2.168 2.114 2.061 2.009 1.959 1.91 1.862 1.815 1.769 1.725 1.682 1.639 1.598 1.558 1.519 1.48 1.443 1.407 1.371 1.337 1.303 1.27 1.238 1.207 1.176 1.146 1.117 1.089 1.062 1.035 1.009 0.983 0.958 0.934 0.91 0.887 0.865 0.843 0.822 0.801 0.781 0.761 0.742 0.723 0.704 0.687 0.669 0.652 0.636 0.62 0.604

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="3" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="3.403" PeakHeight="110.0" Num="3" Error="0.0">
-30.509 13.164 -3.174
</ShiftedChebyshev>
<ShiftedChebyshev Region="F1" StartFrequency="3.403" EndFrequency="5.523" PeakHeight="189.19" Num="5" Error="0.0">
-61.754 -20.424 10.498 -3.748 0.73
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="5.523" EndFrequency="11.225" PeakHeight="333.998" Num="5" zHalfNm="252.931" Error="3.131">
-112.395 -33.388 5.027 -5.094 1.042
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="4.492" Depth="0.123"/>
<TopsideChapman PeakHeight="333.998" PeakDensity="1563283.2" PeakScaleHeight="60.823" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
