<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-03-04 -063 13:40:00.000"
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 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" >
2026.03.04 (063) 13:40:00</StartTime>
<SolarTerrestrialData>
<GyroFrequency Val="0.63" Model="IGRF 3.0" Altitude="300"/>
<DipAngle Val="-11.16" 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">
FF202606303041340009039031101000005018000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="30" >
<URSI ID="00" Val="11.875" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="10" Val="5.473" Name="foF1" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="2.776" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="32.898" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="4.350" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="4.350" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="12.300" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="195.000" 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="0.200" Name="FF" Units="MHz" QL="/" DL="/" />
<URSI ID="88" Val="11.450" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="450.000" 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="3.322" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="4.350" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="5.500" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<Modeled Name="foF1p" Val="4.329" Units="MHz" ModelName="IRI-90" />
<URSI ID="92" Val="327.594" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="91" Val="180.631" Name="hmF1" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="249.906" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="7.534" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="84.213" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="95" Val="58.004" Name="yF1" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="43.191" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="54.845" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="138.460" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="1.060" Name="B1" QL="/" DL="/" />
<URSI ID="D2" Val="0.140" Name="D1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="2">
<Trace Type="standard" Layer="F2" Polarization="O" Num="128">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
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 11.2 11.25 11.3 11.35 11.4 11.45 11.5 11.55 11.6 11.65 11.7 11.75 11.8 11.85
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
290.000 290.000 290.000 290.000 290.000 290.000 290.000 290.000 295.000 295.000 295.000 295.000 295.000 295.000 295.000 295.000 297.500 300.000 302.500 305.000 305.000 305.000 305.000 310.000 310.000 310.000 312.500 315.000 315.000 315.000 320.000 322.000 324.000 326.000 328.000 330.000 330.000 330.000 330.000 330.000 330.000 332.500 335.000 335.000 340.000 345.000 345.000 345.000 346.667 348.333 350.000 350.000 355.000 355.000 355.000 360.000 360.000 360.000 360.000 365.000 365.000 370.000 370.000 370.000 370.000 375.000 375.000 375.000 380.000 380.000 385.000 385.000 385.000 385.000 390.000 390.000 390.000 390.000 395.000 397.500 400.000 402.500 405.000 405.000 406.667 408.333 410.000 410.000 410.000 410.000 415.000 415.000 415.000 415.000 415.000 417.500 420.000 420.000 422.500 425.000 426.667 428.333 430.000 431.667 433.333 435.000 435.000 437.500 440.000 440.000 440.000 440.000 445.000 445.000 445.000 445.000 450.000 455.000 460.000 450.000 460.000 460.000 465.000 465.000 470.000 475.000 482.445 492.274
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
54 0 0 0 51 0 48 48 57 57 54 0 0 0 54 57 0 54 0 48 57 60 63 60 60 63 0 57 63 60 54 0 51 0 0 48 54 60 60 57 51 0 60 54 60 57 60 60 0 0 60 60 57 63 66 60 66 63 60 63 66 60 63 66 66 63 66 66 66 69 63 69 72 66 69 69 66 66 69 54 60 45 51 51 0 0 45 0 54 54 45 48 54 57 60 54 60 63 0 54 0 0 0 0 0 51 54 0 45 0 54 57 57 60 60 54 0 42 42 45 51 54 54 54 57 54 45 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 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 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 1.953125 -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 1.171875 0.390625 -0.390625 2.734375 -0.390625 -0.390625 1.953125 -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 -0.390625 -0.390625 -0.390625 -0.390625 -1.953125
</TraceValueList>
</Trace>
<Trace Type="standard" Layer="F1" Polarization="O" Num="23">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
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
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
195.000 200.000 200.000 205.000 207.500 210.000 215.000 219.688 224.375 229.063 233.750 238.438 243.125 247.813 252.500 257.188 261.875 266.563 271.250 275.938 280.625 285.313 290.000
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
51 48 48 51 0 51 51 45 0 0 51 0 0 0 0 0 0 0 0 0 0 0 48
</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 2.734375 0.390625 0.390625 1.171875 1.953125 2.734375 0.390625 1.953125 -0.390625 0.390625 1.171875 -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" >
89.494 90.0 95.0 100.0 105.0 110.0 111.829 113.658 115.0 115.487 120.0 125.0 130.0 135.0 140.0 145.0 150.0 155.0 160.0 165.0 170.0 175.0 180.0 180.631 185.0 190.0 195.0 200.0 205.0 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 327.594 330.0 335.0 340.0 345.0 350.0 355.0 360.0 365.0 370.0 375.0 380.0 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0 850.0 855.0 860.0 865.0 870.0 875.0 880.0 885.0 890.0 895.0 900.0 905.0 910.0 915.0 920.0 925.0 930.0 935.0 940.0 945.0 950.0 955.0 960.0 965.0 970.0 975.0 980.0 985.0 990.0 995.0 1000.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.24 2.235 2.875 3.214 3.322 3.199 3.199 3.289 3.322 3.513 3.723 3.946 4.17 4.377 4.56 4.72 4.864 4.998 5.124 5.247 5.37 5.471 5.473 5.642 5.838 6.036 6.238 6.443 6.652 6.863 7.077 7.294 7.512 7.733 7.954 8.177 8.401 8.626 8.851 9.077 9.304 9.532 9.761 9.993 10.226 10.462 10.701 10.944 11.191 11.437 11.672 11.846 11.875 11.873 11.854 11.818 11.766 11.698 11.616 11.521 11.414 11.296 11.168 11.03 10.885 10.733 10.574 10.41 10.241 10.068 9.892 9.713 9.532 9.349 9.165 8.981 8.796 8.611 8.427 8.243 8.061 7.88 7.701 7.523 7.348 7.174 7.003 6.835 6.668 6.505 6.344 6.186 6.031 5.879 5.729 5.583 5.44 5.299 5.162 5.027 4.895 4.767 4.641 4.518 4.398 4.281 4.166 4.055 3.946 3.839 3.736 3.635 3.536 3.44 3.346 3.255 3.166 3.079 2.995 2.913 2.833 2.755 2.679 2.605 2.533 2.463 2.395 2.329 2.264 2.201 2.14 2.081 2.023 1.967 1.912 1.859 1.807 1.757 1.708 1.66 1.614 1.569 1.525 1.483 1.441 1.401 1.362 1.324 1.287 1.251 1.216 1.182 1.149 1.116 1.085 1.055 1.025 0.997 0.969 0.941 0.915 0.889 0.865 0.84 0.817 0.794 0.772 0.75 0.729 0.708 0.689 0.669 0.65 0.632 0.614 0.597 0.58 0.564 0.548 0.533 0.518 0.503 0.489 0.476 0.462 0.449 0.437 0.424

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="3" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="3.322" PeakHeight="110.0" Num="3" Error="0.0">
-30.452 13.079 -3.133
</ShiftedChebyshev>
<ShiftedChebyshev Region="F1" StartFrequency="3.322" EndFrequency="5.473" PeakHeight="180.631" Num="5" Error="0.0">
-53.323 -17.845 9.151 -4.173 1.046
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="5.473" EndFrequency="11.875" PeakHeight="327.594" Num="5" zHalfNm="249.906" Error="2.138">
-108.759 -47.891 12.21 -3.025 0.502
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="5.487" Depth="0.123"/>
<TopsideChapman PeakHeight="327.594" PeakDensity="1749573.5" PeakScaleHeight="54.845" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
