<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-03-01 -060 21:10:00.000"
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 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) 21:10:00</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">
FF202606003012110009039031101000005018000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="29" >
<URSI ID="00" Val="11.150" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="2.604" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="29.032" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="2.000" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="30" Val="3.600" Name="foEs" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="3.550" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="11.550" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="280.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="280.000" Name="h`F2" Units="km" QL="/" DL="/" />
<URSI ID="34" Val="95.000" Name="h`Es" 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="0.150" Name="FF" Units="MHz" QL="/" DL="/" />
<URSI ID="88" Val="10.850" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="505.871" 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="1.163" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="3.550" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="3.550" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<URSI ID="92" Val="379.666" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="306.774" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="9.367" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<Custom Name="fminEs" Val="2.000" Description="Minimum frequency of Es-layer" Units="MHz" />
<URSI ID="94" Val="105.360" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="35.453" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="52.194" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="117.670" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="1.420" Name="B1" QL="/" DL="/" />
<URSI ID="32" Val="3.550" Name="fbEs" Units="MHz" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="2">
<Trace Type="standard" Layer="F2" Polarization="O" Num="153">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
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 10.9 10.95 11.0 11.05 11.1 11.15
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
280.000 280.000 285.000 285.000 285.000 285.000 285.000 285.000 285.000 290.000 291.667 293.333 295.000 295.000 295.000 295.000 295.000 295.000 295.000 295.000 295.000 300.000 300.833 301.667 302.500 303.333 304.167 305.000 305.000 310.000 310.000 310.000 310.000 310.000 310.000 310.000 310.000 320.000 315.000 315.000 318.333 321.667 325.000 325.000 330.000 330.000 330.000 330.000 330.000 330.000 335.000 335.000 335.000 340.000 340.000 340.000 340.000 340.000 340.000 343.000 346.000 349.000 352.000 355.000 355.000 355.000 360.000 360.000 360.000 360.000 365.000 365.000 370.000 371.429 372.857 374.286 375.714 377.143 378.571 380.000 380.000 380.000 385.000 385.000 390.000 390.000 390.000 390.000 395.000 395.000 400.000 400.000 405.000 405.000 405.000 410.000 410.000 410.000 415.000 415.000 417.500 420.000 420.000 420.000 425.000 425.000 430.000 430.000 430.000 430.000 435.000 435.000 437.500 440.000 440.000 445.000 445.000 445.000 450.000 452.000 454.000 456.000 458.000 460.000 460.000 462.500 465.000 466.667 468.333 470.000 470.000 472.500 475.000 475.000 480.000 485.000 482.500 480.000 485.000 490.000 490.000 495.000 495.000 497.500 500.000 502.500 505.871 509.847 514.605 520.401 527.616 536.846 549.071
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
57 57 57 54 0 0 57 54 60 60 0 0 54 0 48 0 69 72 69 63 63 63 0 0 0 0 0 66 0 57 51 0 54 51 0 0 0 54 66 54 0 0 57 54 48 48 51 69 0 66 57 0 69 57 0 0 66 0 63 0 0 54 0 57 69 72 63 66 66 69 66 66 60 0 0 0 0 66 0 63 69 63 66 72 63 66 72 75 78 78 69 69 60 63 63 54 0 63 60 60 48 60 0 66 57 63 51 57 54 66 63 66 57 63 69 57 57 63 54 0 48 0 0 54 60 0 48 0 0 51 54 0 60 66 63 54 0 0 60 51 51 48 42 0 48 0 54 0 51 48 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 -1.171875 -0.390625 -0.390625 -0.390625 -1.171875 -0.390625 -1.171875 2.734375 -0.390625 -0.390625 -0.390625 -1.171875 -0.390625 -1.171875 -1.171875 -0.390625 -1.171875 -0.390625 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -0.390625 -0.390625 -1.171875 -0.390625 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -0.390625 -1.171875 -1.171875 -1.171875 -1.171875 -0.390625 -0.390625 -0.390625 -1.171875 -1.171875 -1.171875 -0.390625 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.953125 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 1.953125 2.734375 2.734375 -1.171875 -2.734375 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.953125 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.953125 -2.734375 -1.171875 1.953125 2.734375 -1.953125 -1.171875 1.171875 -1.171875 -0.390625 2.734375 -1.171875 -1.171875 0.390625 -1.171875 -1.171875 -1.171875 -1.171875 -1.953125 -1.953125 -1.171875 -1.171875 -1.953125 -1.953125 -1.953125 -1.171875 -1.953125 -1.171875 -1.953125 -1.953125 -1.953125 -1.171875 1.171875 -1.171875 1.171875
</TraceValueList>
</Trace>
<Trace Type="standard" Layer="Es" Polarization="O" Num="33">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
2.0 2.05 2.1 2.15 2.2 2.25 2.3 2.35 2.4 2.45 2.5 2.55 2.6 2.65 2.7 2.75 2.8 2.85 2.9 2.95 3.0 3.05 3.1 3.15 3.2 3.25 3.3 3.35 3.4 3.45 3.5 3.55 3.6
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
95.000 95.000 95.000 95.000 95.000 95.714 96.429 97.143 97.857 98.571 99.286 100.000 100.000 102.500 105.000 102.500 100.000 100.000 100.000 100.000 101.250 102.500 103.750 105.000 100.000 100.833 101.667 102.500 103.333 104.167 105.000 105.000 105.000
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
57 54 0 0 63 0 0 0 0 0 0 60 0 48 54 0 63 54 0 54 48 0 0 54 60 0 0 0 51 0 51 0 51
</TraceValueList>
<TraceValueList Name="DopplerShift" Type="float" Units="Hz" NoValue="99.0" Description="Doppler Frequency Shift" >
0.390625 0.390625 1.953125 -0.390625 -0.390625 0.390625 -0.390625 -0.390625 -2.734375 1.953125 1.953125 -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
</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" >
90.129 95.0 100.0 105.0 110.0 115.0 120.0 124.321 125.0 130.0 135.0 138.641 140.0 145.0 150.0 152.962 155.0 160.0 165.0 170.0 175.0 180.0 185.0 190.0 195.0 200.0 205.0 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0 360.0 365.0 370.0 375.0 379.666 380.0 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0 850.0 855.0 860.0 865.0 870.0 875.0 880.0 885.0 890.0 895.0 900.0 905.0 910.0 915.0 920.0 925.0 930.0 935.0 940.0 945.0 950.0 955.0 960.0 965.0 970.0 975.0 980.0 985.0 990.0 995.0 1000.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.775 1.008 1.126 1.163 1.143 1.081 0.99 0.99 0.99 0.99 0.99 1.006 1.067 1.127 1.163 1.237 1.382 1.513 1.643 1.777 1.917 2.066 2.225 2.397 2.583 2.783 2.996 3.223 3.461 3.708 3.961 4.219 4.479 4.74 5.0 5.26 5.518 5.775 6.031 6.285 6.538 6.79 7.042 7.293 7.544 7.795 8.047 8.299 8.552 8.806 9.061 9.318 9.574 9.831 10.086 10.336 10.576 10.797 10.982 11.108 11.15 11.15 11.139 11.109 11.062 10.998 10.92 10.828 10.723 10.607 10.48 10.344 10.2 10.049 9.891 9.727 9.559 9.388 9.212 9.035 8.855 8.674 8.492 8.31 8.127 7.946 7.764 7.584 7.406 7.229 7.054 6.881 6.71 6.542 6.376 6.213 6.052 5.895 5.74 5.588 5.44 5.294 5.151 5.012 4.876 4.742 4.612 4.485 4.36 4.239 4.121 4.005 3.893 3.783 3.676 3.572 3.471 3.372 3.276 3.183 3.091 3.003 2.917 2.833 2.751 2.672 2.595 2.52 2.447 2.376 2.307 2.24 2.175 2.111 2.05 1.99 1.932 1.876 1.821 1.768 1.716 1.666 1.617 1.57 1.524 1.479 1.436 1.394 1.353 1.313 1.275 1.237 1.201 1.166 1.131 1.098 1.066 1.035 1.004 0.975 0.946 0.918 0.891 0.865 0.839 0.815 0.791 0.767 0.745 0.723 0.702 0.681 0.661 0.641 0.623 0.604 0.586 0.569 0.552 0.536 0.52 0.505 0.49 0.476 0.462 0.448

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="2" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="1.163" PeakHeight="110.0" Num="3" Error="0.0">
-27.153 8.721 -1.439
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="1.163" EndFrequency="11.15" PeakHeight="379.666" Num="5" zHalfNm="306.774" Error="4.004">
-200.951 -43.839 25.856 -12.818 5.048
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="42.962" Depth="0.173"/>
<TopsideChapman PeakHeight="379.666" PeakDensity="1542462.8" PeakScaleHeight="52.194" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
