<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-10-30 -303 17:20:00.000"
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="14.0">
<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="1 2 0 0 0 0 0 0 0 44 0 0 0 0 0 0 0 0 0 0 "/>
<Comments>AR.5002.44 Confidence: 50% PACIFIC flags: F2x cusp not found, 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" >
2026.10.30 (303) 17:20:00</StartTime>
<SolarTerrestrialData>
<GyroFrequency Val="0.63" Model="IGRF 3.0" Altitude="300"/>
<DipAngle Val="-11.40" 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">
FF202630310301720009039031101000005014000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="29" >
<URSI ID="00" Val="9.650" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="2.533" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="24.440" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="1.850" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="8.550" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="81" Val="1.850" Name="fminE" Units="MHz" QL="/" DL="/" />
<URSI ID="20" Val="2.010" Name="foE" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="9.950" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="465.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="465.000" Name="h`F2" Units="km" QL="/" DL="/" />
<URSI ID="24" Val="81.426" Name="h`E" Units="km" QL="/" DL="/" />
<URSI ID="90" Val="80.890" Name="hmE" Units="km" QL="/" DL="/" />
<URSI ID="83" Val="2.055" Name="yE" Units="km" QL="/" DL="/" />
<URSI ID="86" Val="0.100" Name="FF" Units="MHz" QL="/" DL="/" />
<URSI ID="88" Val="8.850" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="481.667" 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="3.109" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="8.550" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="8.550" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<Modeled Name="foF1p" Val="4.227" Units="MHz" ModelName="IRI-90" />
<URSI ID="92" Val="356.426" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="233.627" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="9.931" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="170.325" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="44.434" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="90.551" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="181.110" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="1.840" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="2">
<Trace Type="standard" Layer="F2" Polarization="O" Num="23">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
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
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
465.000 465.000 468.333 471.667 475.000 478.333 481.667 485.000 492.500 500.000 505.000 510.000 515.000 520.000 530.000 535.000 544.388 555.644 569.388 586.546 608.573 637.881 678.797
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
0 48 0 0 0 0 0 54 0 51 48 51 57 60 57 48 54 45 54 45 51 45 48
</TraceValueList>
<TraceValueList Name="DopplerShift" Type="float" Units="Hz" NoValue="99.0" Description="Doppler Frequency Shift" >
-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
</TraceValueList>
</Trace>
<Trace Type="standard" Layer="E" Polarization="O" Num="4">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
1.85 1.9 1.95 2.0
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
81.426 82.494 83.615 84.793
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
54 0 0 54
</TraceValueList>
<TraceValueList Name="DopplerShift" Type="float" Units="Hz" NoValue="99.0" Description="Doppler Frequency Shift" >
-0.390625 0.390625 -0.390625 -2.734375
</TraceValueList>
</Trace>
</TraceList>
<ProfileList Num="1">
<Profile  Algorithm="NH" AlgorithmVersion="4.33" Type="vertical" >
<Tabulated Num="191">
<AltitudeList Type="float" Units="km" Description="Altitude above station level" >
78.81 80.0 80.89 83.627 85.0 86.363 89.1 90.0 95.0 100.0 105.0 110.0 115.0 120.0 125.0 130.0 135.0 140.0 145.0 150.0 155.0 160.0 165.0 170.0 175.0 180.0 185.0 190.0 195.0 200.0 205.0 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0 356.426 360.0 365.0 370.0 375.0 380.0 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0 850.0 855.0 860.0 865.0 870.0 875.0 880.0 885.0 890.0 895.0 900.0 905.0 910.0 915.0 920.0 925.0 930.0 935.0 940.0 945.0 950.0 955.0 960.0 965.0 970.0 975.0 980.0 985.0 990.0 995.0 1000.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 1.811 2.01 1.931 1.931 1.931 2.01 2.033 2.16 2.286 2.413 2.543 2.677 2.816 2.959 3.108 3.263 3.423 3.589 3.759 3.935 4.114 4.296 4.481 4.668 4.856 5.044 5.232 5.42 5.607 5.793 5.977 6.16 6.341 6.52 6.697 6.871 7.043 7.213 7.38 7.545 7.706 7.864 8.019 8.17 8.318 8.46 8.599 8.731 8.859 8.979 9.092 9.198 9.294 9.381 9.457 9.522 9.574 9.613 9.638 9.649 9.65 9.649 9.642 9.629 9.612 9.59 9.562 9.531 9.494 9.454 9.41 9.362 9.31 9.255 9.197 9.135 9.071 9.004 8.935 8.863 8.789 8.714 8.636 8.557 8.476 8.393 8.309 8.224 8.138 8.052 7.964 7.875 7.786 7.697 7.606 7.516 7.425 7.335 7.244 7.153 7.062 6.971 6.88 6.79 6.7 6.61 6.52 6.431 6.342 6.254 6.167 6.08 5.993 5.908 5.823 5.738 5.655 5.572 5.489 5.408 5.327 5.248 5.169 5.09 5.013 4.937 4.861 4.786 4.712 4.639 4.567 4.496 4.426 4.356 4.287 4.22 4.153 4.087 4.022 3.958 3.894 3.832 3.77 3.709 3.65 3.591 3.532 3.475 3.418 3.363 3.308 3.254 3.2 3.148 3.096 3.045 2.995 2.946 2.897 2.849 2.802 2.756 2.71 2.665 2.62 2.577 2.534 2.492 2.45 2.409 2.369 2.329 2.29 2.252 2.214 2.177 2.14 2.105 2.069 2.034 2.0 1.966 1.933 1.901 1.869 1.837 1.806 1.776 1.746 1.716

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="2" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="2.01" PeakHeight="80.89" Num="3" Error="0.347">
-2.988 1.144 -0.236
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="2.01" EndFrequency="9.65" PeakHeight="356.426" Num="5" zHalfNm="233.627" Error="3.134">
-259.353 -13.742 9.006 -5.02 1.783
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="8.21" Depth="0.079"/>
<TopsideChapman PeakHeight="356.426" PeakDensity="1155366.0" PeakScaleHeight="90.551" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
