<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-01-26 -026 21:40:00.000"
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 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: F2x cusp not found, 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" >
2026.01.26 (026) 21:40:00</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">
FF202602601262140009039031101000005018000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="28" >
<URSI ID="00" Val="9.150" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="2.099" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="19.207" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="1.600" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="30" Val="2.200" Name="foEs" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="3.300" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="9.500" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="360.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="360.000" Name="h`F2" Units="km" QL="/" DL="/" />
<URSI ID="34" Val="100.000" 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="0.100" Name="FF" Units="MHz" QL="/" DL="/" />
<URSI ID="88" Val="8.100" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="610.000" 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="0.645" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="3.450" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="3.450" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<URSI ID="92" Val="520.851" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="393.317" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="7.219" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<Custom Name="fminEs" Val="1.600" Description="Minimum frequency of Es-layer" Units="MHz" />
<URSI ID="94" Val="184.214" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="41.495" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="94.493" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="179.760" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="2.150" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="2">
<Trace Type="standard" Layer="F2" Polarization="O" Num="118">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
3.3 3.35 3.4 3.45 3.5 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
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
365.000 365.000 365.000 360.000 370.000 370.000 370.000 370.000 370.000 375.000 375.000 376.500 378.000 379.500 381.000 382.500 384.000 385.500 387.000 388.500 390.000 390.000 392.396 394.792 397.188 399.583 401.979 404.375 406.771 409.167 411.563 413.958 416.354 418.750 421.146 423.542 425.938 428.333 430.729 433.125 435.521 437.917 440.313 442.708 445.104 447.500 449.896 452.292 454.688 457.083 459.479 461.875 464.271 466.667 469.063 471.458 473.854 476.250 478.646 481.042 483.438 485.833 488.229 490.625 493.021 495.417 497.813 500.208 502.604 505.000 510.000 510.000 510.000 515.000 520.000 525.000 530.000 530.000 530.000 535.000 539.000 543.000 547.000 551.000 555.000 560.000 560.000 565.000 570.000 575.000 580.000 585.000 590.000 595.000 600.000 605.000 610.000 620.000 625.000 630.000 635.000 645.000 650.000 655.000 665.000 671.937 679.454 687.626 696.544 706.314 717.065 728.951 742.163 756.937 773.565 792.422 813.985 838.885
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
60 0 60 57 0 63 0 72 69 63 63 0 0 54 0 0 0 0 0 0 60 60 0 0 0 0 0 0 54 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 57 54 0 63 63 0 0 54 63 60 63 0 0 0 0 60 63 66 63 60 60 63 60 63 63 54 60 60 54 57 0 54 51 48 54 51 54 57 60 57 60 63 66 60 60 54 51 57 51
</TraceValueList>
<TraceValueList Name="DopplerShift" Type="float" Units="Hz" NoValue="99.0" Description="Doppler Frequency Shift" >
-1.171875 -0.390625 -1.171875 -1.171875 -1.953125 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.953125 -2.734375 -0.390625 -0.390625 -1.171875 -1.171875 -1.953125 -1.953125 -1.171875 -1.171875 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.171875 0.390625 -1.171875 1.953125 -1.953125 -0.390625 2.734375 1.953125 -2.734375 0.390625 -1.171875 -0.390625 -2.734375 -2.734375 0.390625 -1.171875 2.734375 1.171875 2.734375 1.953125 -2.734375 -0.390625 2.734375 -1.953125 -1.171875 -2.734375 -1.953125 -2.734375 -0.390625 -1.171875 1.953125 -1.953125 0.390625 -1.171875 2.734375 -1.953125 -2.734375 -1.953125 1.171875 -1.953125 -2.734375 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -2.734375 -1.953125 -1.953125 -2.734375 1.953125 -1.953125 -2.734375 -2.734375 -1.953125 -2.734375 -2.734375 -2.734375 -2.734375 -2.734375 -2.734375 -2.734375 -2.734375 -2.734375 -2.734375 -2.734375 -2.734375 -2.734375 -2.734375 -2.734375 -2.734375 -2.734375 -2.734375 -2.734375 -2.734375 -2.734375 -2.734375 -2.734375 -2.734375 -2.734375 -2.734375 -2.734375 -2.734375 -2.734375 -2.734375
</TraceValueList>
</Trace>
<Trace Type="standard" Layer="Es" Polarization="O" Num="13">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
1.6 1.65 1.7 1.75 1.8 1.85 1.9 1.95 2.0 2.05 2.1 2.15 2.2
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
100.000 105.000 105.000 105.000 105.000 100.000 100.000 100.000 105.000 110.000 110.000 110.000 115.000
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
57 57 0 0 57 63 66 69 69 57 0 57 51
</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 -1.171875 -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" >
90.936 95.0 100.0 105.0 110.0 115.0 120.0 125.0 130.0 135.0 135.863 140.0 145.0 150.0 155.0 160.0 161.725 165.0 170.0 175.0 180.0 185.0 187.588 190.0 195.0 200.0 205.0 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0 360.0 365.0 370.0 375.0 380.0 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 520.851 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0 850.0 855.0 860.0 865.0 870.0 875.0 880.0 885.0 890.0 895.0 900.0 905.0 910.0 915.0 920.0 925.0 930.0 935.0 940.0 945.0 950.0 955.0 960.0 965.0 970.0 975.0 980.0 985.0 990.0 995.0 1000.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.428 0.559 0.624 0.645 0.636 0.607 0.557 0.477 0.347 0.314 0.314 0.314 0.314 0.314 0.314 0.314 0.356 0.42 0.484 0.548 0.612 0.645 0.683 0.751 0.815 0.878 0.942 1.007 1.076 1.148 1.225 1.307 1.394 1.488 1.59 1.699 1.818 1.945 2.081 2.227 2.382 2.545 2.716 2.892 3.073 3.258 3.446 3.635 3.824 4.014 4.204 4.392 4.579 4.765 4.95 5.133 5.314 5.493 5.67 5.846 6.019 6.19 6.359 6.526 6.69 6.852 7.011 7.167 7.319 7.469 7.615 7.757 7.894 8.027 8.155 8.278 8.394 8.505 8.608 8.704 8.792 8.871 8.942 9.003 9.053 9.094 9.124 9.142 9.15 9.15 9.148 9.142 9.131 9.115 9.095 9.071 9.042 9.01 8.974 8.935 8.892 8.847 8.798 8.746 8.692 8.635 8.575 8.514 8.45 8.384 8.317 8.247 8.176 8.104 8.03 7.955 7.879 7.802 7.724 7.645 7.565 7.485 7.404 7.323 7.241 7.159 7.077 6.994 6.912 6.829 6.747 6.664 6.581 6.499 6.417 6.335 6.253 6.172 6.091 6.011 5.931 5.851 5.772 5.694 5.616 5.538 5.461 5.385 5.31 5.235 5.16 5.087 5.014 4.942 4.87 4.8 4.73 4.66 4.592 4.524 4.457 4.391 4.325 4.261 4.197 4.134 4.071 4.01 3.949 3.889 3.829 3.771 3.713 3.656 3.6 3.544 3.489 3.435 3.382 3.329 3.277 3.226 3.176 3.126 3.077 3.029

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="2" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="0.645" PeakHeight="110.0" Num="3" Error="0.0">
-24.149 5.747 -0.662
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="0.645" EndFrequency="9.15" PeakHeight="520.851" Num="5" zHalfNm="393.317" Error="6.96">
-339.721 5.216 3.854 -7.656 5.044
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="77.588" Depth="0.331"/>
<TopsideChapman PeakHeight="520.851" PeakDensity="1038740.7" PeakScaleHeight="94.493" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
