<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-01-30 -030 15:00:00.000"
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 22 0 0 0 0 0 0 0 0 1 0 "/>
<Comments>AR.5002.44 Confidence: 70% PACIFIC flags: 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" >
2026.01.30 (030) 15:00:00</StartTime>
<SolarTerrestrialData>
<GyroFrequency Val="0.63" Model="IGRF 3.0" Altitude="300"/>
<DipAngle Val="-11.12" 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">
FF202603001301500009039031101000005018000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="29" >
<URSI ID="00" Val="9.150" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="2.543" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="23.269" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="4.150" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="30" Val="4.900" Name="foEs" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="5.850" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="9.450" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="355.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="355.000" Name="h`F2" Units="km" QL="/" DL="/" />
<URSI ID="34" Val="110.000" 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="0.250" Name="FF" Units="MHz" QL="/" DL="/" />
<URSI ID="88" Val="8.750" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="511.714" 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="3.370" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="5.850" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="5.850" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<Modeled Name="foF1p" Val="4.350" Units="MHz" ModelName="IRI-90" />
<URSI ID="92" Val="341.291" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="231.197" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="7.249" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<Custom Name="fminEs" Val="4.150" Description="Minimum frequency of Es-layer" Units="MHz" />
<URSI ID="94" Val="130.897" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="34.983" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="76.593" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="198.970" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="1.040" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="2">
<Trace Type="standard" Layer="F2" Polarization="O" Num="67">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
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
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
355.000 355.000 360.000 363.000 366.000 369.000 372.000 375.000 375.833 376.667 377.500 378.333 379.167 380.000 385.000 385.000 385.000 385.000 390.000 395.000 395.000 396.667 398.333 400.000 400.000 410.000 412.500 415.000 415.000 420.000 420.000 425.000 425.000 427.500 430.000 430.000 435.000 435.000 440.000 445.000 445.000 450.000 455.000 460.000 462.500 465.000 465.000 470.000 475.000 475.000 480.000 485.000 490.000 495.000 495.000 500.000 505.000 508.190 511.714 515.628 520.000 524.916 530.484 536.842 544.172 552.716 562.801
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
51 51 54 0 0 0 0 48 0 0 0 0 0 60 54 57 54 54 60 48 48 0 0 63 54 45 0 45 54 51 57 48 57 0 54 57 63 63 60 51 57 57 63 48 0 60 63 63 51 60 60 48 63 54 54 60 63 63 60 57 57 60 51 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 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 1.953125 -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 -0.390625 2.734375 -2.734375 -2.734375 -1.953125
</TraceValueList>
</Trace>
<Trace Type="standard" Layer="Es" Polarization="O" Num="16">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
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
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
110.000 110.000 112.500 115.000 110.000 115.000 113.750 112.500 111.250 110.000 112.500 115.000 115.000 115.000 115.000 120.000
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
54 57 0 54 60 48 0 0 0 57 0 0 0 0 51 45
</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
</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" >
89.487 90.0 95.0 100.0 105.0 110.0 111.635 113.27 114.905 115.0 120.0 125.0 130.0 135.0 140.0 145.0 150.0 155.0 160.0 165.0 170.0 175.0 180.0 185.0 190.0 195.0 200.0 205.0 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 341.291 345.0 350.0 355.0 360.0 365.0 370.0 375.0 380.0 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0 850.0 855.0 860.0 865.0 870.0 875.0 880.0 885.0 890.0 895.0 900.0 905.0 910.0 915.0 920.0 925.0 930.0 935.0 940.0 945.0 950.0 955.0 960.0 965.0 970.0 975.0 980.0 985.0 990.0 995.0 1000.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.24 2.267 2.916 3.26 3.37 3.247 3.247 3.37 3.374 3.56 3.729 3.888 4.039 4.183 4.323 4.459 4.592 4.723 4.851 4.978 5.103 5.227 5.35 5.473 5.594 5.716 5.836 5.957 6.078 6.199 6.32 6.441 6.563 6.685 6.808 6.931 7.056 7.181 7.308 7.435 7.564 7.695 7.826 7.96 8.095 8.231 8.368 8.506 8.643 8.778 8.906 9.019 9.106 9.148 9.15 9.148 9.139 9.122 9.099 9.07 9.034 8.993 8.946 8.894 8.838 8.776 8.711 8.641 8.568 8.491 8.411 8.329 8.243 8.155 8.065 7.973 7.88 7.784 7.688 7.59 7.491 7.391 7.291 7.19 7.088 6.986 6.885 6.783 6.681 6.579 6.477 6.376 6.275 6.175 6.075 5.976 5.878 5.78 5.683 5.587 5.492 5.398 5.304 5.212 5.121 5.031 4.941 4.853 4.766 4.681 4.596 4.512 4.43 4.349 4.269 4.19 4.112 4.036 3.96 3.886 3.813 3.741 3.67 3.601 3.532 3.465 3.399 3.334 3.27 3.207 3.145 3.084 3.025 2.966 2.909 2.852 2.797 2.742 2.689 2.636 2.584 2.534 2.484 2.435 2.387 2.34 2.294 2.249 2.205 2.161 2.118 2.076 2.035 1.995 1.955 1.916 1.878 1.841 1.804 1.768 1.733 1.699 1.665 1.631 1.599 1.567 1.536 1.505 1.475 1.445 1.416 1.388 1.36 1.333 1.306 1.28 1.254 1.229 1.205 1.18 1.157 1.134 1.111 1.088 1.067 1.045 1.024

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="2" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="3.37" PeakHeight="110.0" Num="3" Error="0.0">
-30.486 13.13 -3.157
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="3.37" EndFrequency="9.15" PeakHeight="341.291" Num="5" zHalfNm="231.197" Error="3.03">
-183.58 -65.914 25.954 -3.088 0.242
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="4.905" Depth="0.123"/>
<TopsideChapman PeakHeight="341.291" PeakDensity="1038740.7" PeakScaleHeight="76.593" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
